I'm working as a QA Engineer currently. I left being a developer about 2 years back so that I could have more time to play games. I have been a hardcore gamer my entire life and loved it.
I started playing games with my 386 (like accolade, barbarian, lame pacman, prince of persia, Wolfenstein(at my friends place on his 486 ;) )).
Pentium 1: text games, monkey island, evil days of luckless john, red baron, evil genius ;) etc. you name it. I've played it. not to mention the common games.
nintendo (8 bits): a pretty huge no. of games - can't list em.
sega (16 bits): again a pretty huge no.
pc/lappy: My current favs include series - Assassins Creed, Prince Persia, Monkey Island , Sam and Max, Call of Duty, Splinter cell, Star wars (action ones) - all series...
Its going to be a very very huuuuge list.