Sony has some really cool first-party IPs. I am a fan of LittleBigPlanet, inFamous and Uncharted. I also really like the backstory of the Killzone franchise.
I would add my dislike of Sony comes far more out of gloating internet fanboys who trolled against the likes of Sega, and put a seriously bad taste in my mouth than anything else. Although the arrogance of the PS3 launch did add something to it.