nooooooobody's gone into detail about brass?
well, there's the french horn part.
I
brass, lol. I play trumpet. ummm...for brass, it requires a lot more mouth than the woodwinds; with, say, a clarinet, most of it is fingerings. While you need a strong embrouchure (or however you spell it, it's how your mouth is on the instrument) to get a good tone, it's not actively used in changing notes. With an instrument such as french horn or trumpet, you need a LOT of flexibility - I can play five different notes with the same fingering, all using my lips, (on a good day. sometimes it's four. XD) and with french horn you can play even more (that's why it's hard, as far as I can tell - you have to be really good at figuring out which pitch you want before you play it, otherwise you won't get it). It's because there are only three keys, when in things like clarinet or sax you have a zillion different keys (which is fun when you abduct your friend's instrument to mess with and in general produce terrible sounds from.) I personally like being trumpet - as first trumpet I get most of the melodies, and I'm a bossy easily bored kind of person so I like being able to play out.
I don't know too much about the lower instruments - tuba, baritone, et al. Does your band have instruments like that? I don't know. My high school band does, but we have a very good director who wants lots of instruments and such. It may come down to cost, too, instruments aren't cheap XD so you may not have a wide range to choose from.
....so yeah, hope that helps even in the tiniest way.
it probably didn't but oh well. I like my trumpet.