It'd be cool though, say if someone is riding one, and you shoot the person off of it, and jump on the rhino..Bleh, Rockstar would think of a way to make that happen.
worst would have to be.. well. i don't buy bad games. but from my collection, i'd have to say The Mark of Kri. was an decent game, its just the worst of what i own.
Fire Warrior, the Warhammer 40k game. Never even bothered completing the second level, that game was sooo linear it was an offence on my disk drive to run it. <_<
Unreall 2004 or watever. Such a shoddy improvement on the gem that was the original Unreal and Unreal Tournament.
It's kind of the opposite of that, you realise you're only playing one game, but you are saving money by only playing one. You can buy about 1 1/2 new games with the subscription fee of the game per year. Anyway, you don't get any diversity though.
Sea monkey adventures....or the magic pengel...uggh I bought a lot of stupid games because I had to spend money.