As someone who has owned both, PS3 has a stronger first party line up.
It's generally fine for third party games except for when developers skimp with the ports.
I like both consoles, I think Gears of War series is the best shooter on either platform for instance.
But I'm the type who thinks an idle rant on users of a specific console or the console itself when it is developer issues is rather petty.
The only games on ps3 that I think are worth having is the GOW series, Uncharted, Prototype, and another game which I like but slips my mind ATM.
Tbh I don't like GOW, I like Skyrim and all it's previous versions but wouldn't say they are great games, and Halo I absolutely hate, Forza is good but not something I can play over and over like I did with gran turismo.
I agree ps3 probably have a better starting line up (my preference of gaming) but I can say that 360 just offers a better quality experience in gaming.
On top of that the ps3 controller is an absolute fail, the way they tilted the r2 and l2 buttons so that the controller constantly slides out of your hand and doesn't sit properly is just a fail, the ps2 controller hands down beats both the ps3 and 360 controller so I don't understand why they had to change it.
Anyway this argument has been down to death, I just don't understand the constant bickering by the same people who most likely had the same issue with bops and are still surprised when they find out they are having issues.