Interestingly, to me at least, I don't volunteer myself, but my friend/one of the girls I love is just all over volunteering for stuff and helping the environment, and crafting stuff out of other stuff....
And if I ever get to date her I fully intend to be right there alongside her with all of that stuff- because
A] She's busy as hell and it'd give me more time with her,
and
B] I'm naturally inclined towards helping, but I simply have no idea where to start with volunteer work. And despite my inclination to help, I don't actually -care-. Where she's concerned though, I care that -she- cares and want to help -her-, so I'd happily unleash my natural inclination to help there.
I'm much more likely to donate money to kids, animals, and medical research than anything else. Money towards solving problems that are helpless to solve themselves.