Did anybody call GTA San Andreas an RPG hybrid? No. But you could buy clothes to change your appearance, build your muscles and stamina, etc.
Like you said,
San Andreas was definitely not an RPG hybrid, even if it did have some elements of an RPG. Having said that, I found that even
San Andreas allowed for more roleplaying -- slight as it was -- than
Bioshock.
I wonder if Rockstar would actually want to turn GTA into an RPG. It could easily, with the huge open world, the NPCs, the stat manipulation etc.
If GTA presented gamers with actual morale choices that affected the storyline, at least somewhat, then it would be on its way. Unfortunately, that would probably take away from the fun. Running down a hundred cops in GTA is fun because there is no actual consequence. If the game presented weeping widows, and realistic consequences, then no one would be playing the bad guy.
It is like when I tried to play the evil role in
KOTOR or
Baldur's Gate II. I just couldn't, because I actually felt bad. In
GTA, I never felt bad, because crushing
GTA policemen was more like taking a sledgehammer to a watermelon, rather than an actual skull.
From a philosophical point any game which lets you take on the role of a character is a "role playing game." So what defines a typical RPG? What sets it apart and gives it the label? I think we have to figure that out before we can get into a discussion about what games fall under which genres.
Are RPG's games in which you build a character and select its stats? Are they games in which your character can make plot-affecting choices?
Yes, but the term "RPG" is used in gaming circles in a very specific sense, and not in the most literal sense. (Damn you for starting this. )
It's like that with the genre term "Adventure", as well, where by literal definition, every game is an adventure game. Yet, as we all know, Adventure games stand for those that follow a singular path of puzzle solving, character interaction, and exploration, surrounded by a focused narrative. Even that definition isn't absolute, because I am sure you can probably fit games into that definition, that aren't "Adventure".
But back to the subject at hand. I think a game that most industry folk would define as an RPG, is a game, which as it is played through its storyline, allows you to shape the development (most commonly, but not limited to stats) of a character(s)-- created or preexisting --, through the variety of character affecting choices made in that game, to the point where two identical starting characters, can end the game being drastically different or absolutely the same, with the degree of difference depending on the choices made.
I feel by that definition, you can explain why games as dramatically different as
Diablo and
Final Fantasy, can attach RPG to their genre labels. Also by that definition, you can see how
Bioshock isn't at all an RPG, in that its choices are inconsequential.