Hmm… for me, it's less about memory and more about helping myself see a pattern of what I like and what I don't, which eventually helps me make better purchasing decisions.

Like, when I look at a list of my favorite games, I can conclusively tell you: I like challenging, replayable games with real-time action, synergy among their mechanics, and mechanical variety.

For me, this knowledge would not have been attainable if I didn't sit down and put together a list of what I like/what I don't like.