Oddly enough i've player very few of these type of games.
I tend to like most of the anime story lines, but not really into the games them selves. I did play a few times of One
I suppose the anime most for of them are just better then the games in my opinion.
I did play Forever 17 as well, but i don't think i managed to get any of the good ending yet.
All in all id say i prefer the anime that are based on such, but i'll pass on the games themselves.