Positive for me on both consoles:
Comic graphics, gameplay, "Bazillions of guns", splatter scenes, RPS, co-op mode for up to four people, varied enemies, some funny "Easter Eggs"
Negative for me on both consoles:
From time to time one can see through walls, the end and the mystery of the Chamber, Fyrestone missions sometimes a bit annoying and boring, sniper accuracy on long distance (especially on PS3).
The great advantage of the PlayStation version is actually that you have the full game on a Blu-Ray. For the 360s, there is (to my knowledge) only "Mad Moxxi" and "Dr. Ned" as an additional disk in the trade. I have at least found nowhere the other two add-ons on a disc.
Bottom line makes Borderlands on both systems a lot of fun. Crashes I had been on any console this game. The main game I've ever played out on the PS3 without any major problems 7x on the 360s and 3x.
Interested parties should access the uncut version with the additional content on the Blu-Ray, which is offered here every now and again.