PS3 and XBox are still fighting for my money. As soon as I confirm that I will have access to a TV till August I may dip my finances into one or the other... as well as GTAIV of course.
As for the worst bits, I thought I'd include the crashing issue I've read so much about. Has anybody here had any issues, either with a 360 or PS3? This could sway my decision, though I believe it happens for both consoles... unfortunately.