I agree. I only repeat ones that I got wrong but even then it is not as effective because I remember the right answer and why it is right. This gives me a false sense of security and focuses more on memorization than conceptual learning.
I can go back to a question after 1,000 and still remember it word for word. Too bad my memory sucks when it comes to lectures
Many people are completely the opposite and are able to go through practice MCATs, Q-banks, etc multiple times and benefit from it. I would suggest trying a few out, give yourself at least a week or two in between the last time you reviewed that question and when you attempt it again. If you find yourself reading ahead without even seeing the words, you may be like me and need to find additional sources. Otherwise, go for it.