Hey Richard,
1) Any sport is kosher with me!
2) Non-sport is less kosher with me. I think it would have to be a really special non-sport subject that's close to my heart to make me want to do it. I mean REALLY special. Like Bill opined, family portraits and the like aren't my cup of tea.
3) If we can fit more than one person in the painting without compressing the image too much, then that's cool with me.
4) It all depends on the image. For example, the Cy Young image below would probably be alright:
This one, not so much:
And Bill, come on, we both know I have no life. Especially now that Bennett's here!!
Graig