Re: Your Rules
To 21 by ones and twos. Have to win by two, or first to 25.
We usually split up the teams in ways that are interesting but fair. I play with the same 8-15 people all the time. Call your own fouls. Honestly, everybody I play with is pretty reasonable, so we don't have too many issues. I know some people play you have to call and one if you want the hoop to count. That I don't get.
Do or die for the ball.
For horse, I play if everyone makes your shot you get a letter until the last two.
21 has a ton of different names. We call it "rough" where I'm from. We usually require somebody to "check" it past the free throw line after a rebound, but if there's a big guy there, it's a little hard to do. If you let him hang under the rim he'll get everything, and if you make him take it back he's at a huge disadvantage.
We play all by ones, so there's no going over, but I'm accostomed to that style too. Sometimes we play with tip ins, where if you tip in a from a guy who has game point, he goes back to 13. I always liked that rule. We also usually shoot top of the key threes instead of free throws after makes.