What game should I play next

Definitly go for xcom . It is a awesome turn based combat strategy game .

ME 2... one of my favourite games :)

I'd give The Talos Principle another go.

Some of the puzzles can be especially tricky, and I remember getting stumped on a few at first that seemed so easy when I came back to them later and everything just "clicked". (If you truly find yourself getting frustrated by a puzzle or two, I'm sure you can always consult a walkthrough if need be.) It's an amazing game.

I see you don't have Battleblock Theatre listed and it has very low playtime. I vote that :)