I've played all the GTA games since GTA III. They have more than their fair share of irks and faults but, as the scope's so massive, they are or have been regarded as somewhat forgivable. This includes awful character movement and shooting (especially on PC), poor car handling and for GTA San Andreas especially, poor graphics compared to the status quo back then.
But, as you've said there's plenty to do and some very enjoyable activities and scenery. I'm a little surprised that some have found the graphics lacking, I was kinda expecting it for the Xbox 360 and thinking the PS3 would be a shade better and always felt the game would come out on the next gen consoles but astateoftrance has a good comment that maybe the game will shift to an online mmo type version next gen, some kind of fudge so Rockstar can say it's a new game.
Having not long seen Tarantino's Django I know what you mean about overuse of the 'n' word. Yeah, I like QT a lot for his direction and style of photography but he seems to have a fixation on violence and strong language; he always feels he needs to ramp them up to the max and beyond. GTA San Andreas was heavily criticised for stereotyping black people and 'ghetto life'. GTA V is essentially a reworking of GTA SA in many respects. Though I've read Franklin's character gets reluctantly drawn into crime I was a bit depressed Rockstar are continuing to run with the meme though I'm sure they're not unaware that not all black people are gangsta rappers.
So, you haven't played as Trevour yet then?