After playing Spec Ops: The Line, I am very different player than I was before.
I will try to sneak, hide, or persuade to avoid any bloodshed. I will not kill any NPC, unless it's critical situation, and shooting is necessary.
Sure, sometimes I just go on a rampage in a Team Fortress 2/any-other-online-FPS, but that's completely different matter - I shoot entirely for fun and competition.
As for other aspects of games - I collect all items, going to town and selling, then going back, if I can't carry them all (Oblivion, Fallout 3+). I also create tons of characters, most of who don't even reach level 2. Designing characters, that's what I enjoy the most.
Also I love lore, playing with lore rules, immersing myself in the world (Being Imperial Vampire in Oblivion) et cetera.