You know what a really good achievement would be? To do every
miscellaneous thing in the game. GTA IV didn't have one but you can do so many random things you could see in the stats page.
I've done everything at least once on PC but not on Xbox. I'm on about things like eating, nuts, burgers, drinking soda, giving money to hobo's, prostitute visits, binoculars used etc.
I know there are way more but that's all I can remember top of my head. Would be cool just doing a million random little things some even annoying on V.
I remember I spent nearly an hour just trying to find a hobo on IV who directly begs for money lol fuckers are always on the pier/fun park, but I've done that at least pnce now just for the fuck of it.