I'm not a mad collector with over 200 games, but since I've started with the hobby I've amassed some 70 games, expansions and promos included.
I won't list them all, but I try to have a game for every occasion.
This means I have some party games to play with my parents, siblings and associated significant others, Dixit (Odyssey) is a good example.
I also have some 2 player games to play with my wife: Jaipur and Lost Cities.
Then I have an extensive collection to use with my play group and these are mostly ~4p euros: Stone Age, Agricola, Dominion, etc...
My latest purchase has been Flash Point which I'm anxious to try.