I own both systems, among another 2 dozen other systems so I am not a fanboy. What I tell you comes from me being an actual gamer and having used both systems.
I vote ps3.
Ps3 has bluetooth and usb ports for flash drives, keyboard, mice, microphones, headsets, earpieces and so on, the 360 has neither nor can you add them on.
Ps3 has 100% free online gaming, the 360 charges you a annual fee to play any game online or even have a friends list and its cost is going up again. Ps3 also has something called Home which is 100% free and optional to use where you make a character and run through a virtual world with other people, chat, check out themed areas like a resident evil 5 area with mini games, trailers playing on big screens, an apartment you get to own and decorate and its constantly being added onto. Think of Home as kind of like The Sims only it a city about games only it has alot of other people in it also with you. I also prefer to ps3 community, 90% of the time I get on xbox live all I hear are a bunch of immature brats cursing and yelling. Like left 4 dead had a free content pack come out and valve made it free, it was free on the pc but if you had a 360 you had to pay to download it plus you had to pay for xbl to play it online. Or if you want to use like netflix you have to pay for xbl, you have to pay for netflix in order to use it.
Video stuff. You can play blu rays, upcoming 3d blu rays out of the box on the ps3 with no need to buy anything else. Plus the upconversion for dvds on the ps3 is truly awesome. Plus I like that it plays divx and windows media files. I can download videos on my pc, stick them on a flash drive, put the flash drive in my pc and lay in bed and watch the movies on the tv with full options of a dvd like fast forward, fram per second, zoom and so on.
Not to mention the ps3 runs dead quiet vs a 360 which is quite loud. And ps3 is known for being a pretty problem free machine while 360 even to this day still suffers from hardware problems, hell gamestop stopped taking extended warranties on them (don’t know if they do again now or not) because so many people were bringing them back with problems.
Far as games go both systems have 90% of the exact same games. All big names games like megaman 9, wolfenstein, bioshock 1 & 2, dead rising 2, beatles rock band, ghostbusters, bayonetta, call of duty 4, fallout 3, rock band 5, grand theft auto 4, modern warfare 2, brutal legend, marvel vs capcom 2, batman arkahm asylum, madden 10, assassins creed 2 and so on are on both systems and will continue to be on both.
Each year the list of exclusive games gets smaller. But personally the games on the ps3 that are exclusive I like better and have more of a variety to them. Killzone 2, MAG, final fantasy 13 versus, demons souls, uncharted 1 and 2, little big planet, flower, god of war 3, gran turismo 5, super stardust hd, metal gear solid 4, resistance 1 and 2, ratchet and clank a crack in time and tools of destruction, infamous, heavy rain among another dozen titles coming out in the next year that are ps3 only I like better. If you like MMO type games ps3 is only system to announce ones coming out for it, the two being DC universe online and Final Fantasy 14 online. But all big name big production games will be on both systems.
And well, I personally like the ps3 controllers better. They feel more comfortable in my hands, the D-Pad is more precise because the 360 d-pad is just a disc and sometimes pushing up registers as left or right, and the batteries are rechargeable in it I that like so when it gets low I just plug in a usb to mini-usb cable in the front of the ps3 and it charges while I play so I don’t have to buy batteries for it, after 2 years of use my controller still holds its charge like it did new.