I understand what many of you are saying. However, how many premeds will have hobbies that are high impact? And if they did, it would invariably have been mentioned on their AMCAS. For example, Pianola has been playing in concerts since she was barely 6 and I'm quite sure she has already mentioned this on her primary. How many more interesting/unique hobbies that have not been mentioned previously will the vast majority of applicants have?
I enjoy cooking, especially different cuisines, just for our family though. I do not entertain every time I cook. Will that mean I'm socially inept? No! Some Adcoms might like it and somebody else who does not like to experiment will not. I don't think I can make everything interesting to everybody. Can I show excellence in that area? No, I'm by no means a nationally renowned chef. Same thing with gardening, I enjoy it. Again, it is not a community oriented activity, it is my form of relaxation and time for introspection. Does this project me as a loner who does not care about the world, I hope not. If anything it should tell the Adcoms that I take care of myself. Burn out is a big thing in the field of medicine and hopefully people like us will not because of our ability to relax. I have already told the Adcoms what and how I contribute to this society and world, now I think it is time to tell them how I help myself.
I think as long as the activities are not illegal or extremely controversial, you should mention them if you are genuinely interested in them even if you have not contributed in any form except as a spectator. Maybe at the end of a hard day playing video games is your form of relaxation, great! Not everybody prefers to engage in activities that involve people all the time. An activity that is cool or interesting to one person is weird to another, so be yourself!
I'm thinking about listing those activities too in my secondaries. Actually, I think cooking/gardening and the like paints a pretty positive picture of a person as someone who's family-oriented, hard-working, and health conscious. I don't get "loner" from it at all. Everyone likes good food, but not everyone likes to take the time to cook and learn to cook well... a lot of people just don't have the patience... so they depend on the people who do

Anyway, I think people who enjoy to cook tend to be perfectionistic and really enjoy pleasing other people. I also don't cook banquets or anything, mostly just for my family, but I enjoy making things they'll like.
Also, with the gardening thing, that shows an affection for nature that I imagine schools emphasizing rural medicine would take a liking to. I don't know how much of a stretch that is, but I did read about a study once that said rural physicians tend to list outdoor activities for their hobbies.
Anyway, not that any of those reasons/justifications are actually that important. What's important is that you genuinely enjoy those activities and they naturally paint a picture of you. I don't think activities NEED to be "community oriented" in the most obvious sense of clearly not being solitary and clearly involving a group of people.
AND, I think there's a place for introverts in medicine. Not saying you are or aren't, but what is so wrong about enjoying solitary pursuits that involve introspection? (Ironically for the original thread, I don't even think video games or anime or cooking really even qualify as solitary pursuits?)
If anything, I think the bias against video gamers/anime collectors has nothing to do with seeing them as anti-social. Isn't it obvious that gamers associate with other gamers and collectors socialize with other collectors? People associate with others who share their interests. It almost makes me mad, because American culture is so good at throttling non-mainstream hobbies and marginalizing people. A guy who's more interested in gymnastics than football is ridiculed, for no good reason. And here we hit that same wall again in medical school applications. PLEASE, tell us how you're diverse. But don't go outside the box, otherwise you'll get labeled "geek" or "effeminate" or whatever.
Okay, that got a little off-topic.
😉 But I actually don't think Adcoms are AS judgmental like that as maybe the general public. As long as you spin the hobby the right away... i.e. "I like to collect anime because I'm interested in Japanese culture and enjoy seeing different depictions of it, etc." vs "I like to collect anime because the skinny girls with the big boobs are hawt and I have a fetish." Any hobby is amenable to spin.