I had my fingers in all pies. Ive had a snes, master system, mega drive, ps1, ps2, xbox, gamecube and now a ps3 (with the intention of getting an 360 as well at some point because im dying to play gears).
Never did have an N64 though which i feel now was a big mistake given some of the games it had that people still hold in extremely high regard.
I think both the Xbox and PS3 have some excellent exclusives worth buying the consoles for. The only reason I plumped for a PS3 first was simpyl for MGS4 when it came out. The first 3 games are 3 of my all time favourite games ever so I had to have a PS3 to play MGS4. Then as a result ive been able to play awesome games like Uncharted 1 & 2 which are now among my favourite games of all time, GOW III and Heavenly Sword (another game that has become an all time favourite).
I used to have over 150 games for my PS1, PS2, PS3, Xbox and Gamecube but now im down to about 25. They were taking up too much space and most of them i'll never play again so i whittled them down to my favourites that i just couldnt let go of. Basically games I know ill go back to and play again and again. The rest i traded in bit by bit so ive never actually paid for about 5 of the games ive got for my PS3.
They are
Gamecube - MGS: The Twin Snakes
PS1 - MGS, Dino Crisis 1 & 2, Fear Effect, Abe's Oddysee & Exoddus
PS2 - ICO, Shadow of the Collossus, MGS 2 & 3, GTA: Vice City (literally just rebought it yesterday for £4)
PS3 - MGS4, Chronicles of Riddick, Ghostbusters, Heavenly Sword, Uncharted 1 & 2, Bioshock 1 & 2, AVP, GOW Collection (GOW 1 & 2), GOW III
Sadly my Xbox broke and I got rid of all my games. Something i regret because there are a few i wish id kept. Even if they arent BC with the 360 (i understand not all games are) i would have bought a cheap used xbox somewhere to play them. Games like Republic Commando, Far Cry, Jedi Academy, KOTOR, Oddworld:Strangers Wrath were brilliant.
I dont know why i just went into my entire gaming history and my all time favourites but there you have it.