Whilst there are some games that I would like to add to my collection that are cliche A listers there are others that aren't but I would like to own simply because I played them in my younger days and enjoyed them.

That's part of the problem now is getting game time on other titles i have never played to know if I will like them or not. Something I also think about is how indepth the games are too, I would like to know that I'm not going to be bored quickly and still be challenged by a machine a few months down the track. 

With that in mind  i hear people talk about how indepth the rule set is for xyz game etc, what would be some of the more challenging and detailed games out there?