Most people don't do research during the school year, but there a few (the crazy ones 😉). Its just a matter of what is important to you. How much are your realistically going to put in to research a week? 10 hours? 15 hours? Are you going to be able to make a decent contribution to that research with the hours that you put in? And most importantly, is that what you want to be doing with your free time? If you are doing a substantial amount of resaerch during the school year - thats it. You do research, and you study. For me (and most others), we'd just rather take that free time and do something more enjoyable. Same goes for why people dont work. You could work that 10 hours a week or whatever, but really how much are you actually gonna be making? is it worth it? Probably not. Just better to take out loans and enjoy your free time. That being said, a lot of people do research over the summmer between 1st and 2nd year. Whether its b/c research is their passion or they feel pressure to do research to be competitive for a certain field. For me, Im not going to be doing research over summer either. So its whatever it is that you wanna do. There are definitely ample opportunites to get involved with research - both basic science type stuff and more clinical stuff. If its your passion, go for it.
In terms of class, there are going to be people that attend every lecture no matter what, there are going to be people that attend lectures by professors that they hear are good through word of mouth, and then there are people (like me) who just dont go to lecture period regardless of who is teaching it. Theres no right or wrong way to do it and you will find what way works for you. The way i will describe is what works for me, so keep that in mind.
Now I started off the school year going to most lectures, and pretty much every one does. But for me, I found that I didnt really pay attention that well. Im either online checking email or kind of day dreaming. I found that I got irritated with the questions that students asked (people ask some ridiculous questions that are not at all relevant to lecture). I found that for the most part I was unhappy with the presentation of the lecture -they either lectured way to slowly and i was anxious/bored or they went way to fast and I was lost (keep in mind this is just my opinion. and its not even necessarily a reflection of the school as it is my own pickiness, haha.). So how do I solve that? I stop going to class. Its possible to do this in med school b/c they give you all the resources that you need. The professors give you their powerpoints before hand, they give you a set of notes that they themselves have made (these notes are broken down by lecture so you konw exactly what is being covered when), you might have a supplemental textbook you read or a textbook they recommend, all lectures are recorded with link to powerpoint, etc etc. With all of these resources, I can read the material at the speed that I want. I can't complain, b/c I'm in control. If i know a topic well from undergrad or something, I spend less time on it. If i don't konw it at all, I spend a lot of time on it. You know what I mean? And if there is really something that I just can't grasp - I flip to the time of lecture that is covering what I'm reading and i listen to that 3 minutes of lecture in hope that they might explain it in a way that I understand. So you can see how, at least for me, there is no need to go to school and sit in lecture. And my schedule for the day is already made up for me. I just read in my books the subjects that are being covered in lecture. If for the day there is 2 hours of genetics and 2 hours of physio - i'll read the corresponding subjects. Sometimes itll take me less time to go through that material and sometimes it will take me more time
Another reason I say lecture is a waste of time, is the bottom line is that when you look at your core notes and your textbooks and what not, you just need to know EVERYTHING in them. Literally know as much as you possibly can. Its that simple. For the most part, theres nothing that they will say in lecture that is not already said in their core notes or whatever textbook you are reading. So why do I need someone to tell me what I can read on my own? At a pace that I prefer? I dunno if that makes any sense. But this is especially useful in a school that is P/F. And you might say - well how do you know what the professor emphasizes or what he/she thinks is important and/or will be on the exam? For one, youll just kinda figure it out what stuff is more important or what the professor wants you to know (you are always safe with just assuming you need to know everything, unless otherwise specificed). But to answer that question, for me, I could care less what the professor 'emphasizes' or what my score is on an exam is. What I care about most is having a solid understanding of the subjects that I'm studying, and I can get that from the resources that I trust and have been passed down to me. Hopefully, if the lecturer is good, there will be quite a bit of overlap between what is being taught in lecture and what I am reading. So say, for example, I'm studying GI physiology. I have a textbook that I use that I know is a great resource (based on word of mouth from upper classmen and my own experience). I konw if I study this chapter and I know its contents well that I will have a solid grasp of GI physiology. Thats what is most important. It doesn't matter if the professor uses the textbook or not. It doesnt matter what the professor emphasizes in class. GI physiology is GI physiology. It doesnt matter what textbook or resources you use to learn it. I know that if I learn GI physiology well, I will be able to pass the test no problem AND I will also have a solid understand of the subject, which is what is absolutely most important. Now, I may not get a 95% on the test because I might miss some of the questions that were emphasized in lecture here and there, but those points don't matter. My foundation of knowledge for the subject is still there and thats what will help me practice better medicine in the future.
So yea, thats why I say lecture is a waste of time. Haha, sorry for the long winded answer.