I don't really know Ridge Racer 7 (I love my Burnout Paradise though) and am currently playing Resistance: Fall of Men myself.
I actually never owned a console before and only played few games on the PC (I owned a C64 back in the days, which was mainly used for gaming...). I had thought, well, the PS3 is a good upgradable Blu-ray player and I can play a 'little' on the side too. WRONG. Once you start gaming, provided you have some baggage already, you can easily get hooked and spend substantial amounts of time doing so...
Not that I mind my gaming, but it does cut into the DVD watching time.