I bought my PS3 in early 2007 and despite having a lot of issues with it ( the launch price, lack of rumble and custom soundtracks to name a few) I enjoyed it because of games like Motorstorm, Uncharted and Ratchet & Clank. I never really understood all of the criticisms surrounding the PS3's library because it always matched or surpassed the competition in that regard. Again, that's coming from a man who does not exactly view the PS3 favorably as a whole.
I remember a lot of complaints about 3rd party multiplats looking inferior on the PS3. As somebody who owns(ed) a ton of Ubisoft titles on both the PS3 and 360 I can honestly say that they all look like garbage :P
Seriously though, I'll sit down and give Rainbow Six Vegas a spin once in a blue moon on my 360 and think to myself "This is the superior version, the reason why the PS3 got so much flack?".