Carolyn, I find that gloves are a very personal issue. and there are a couple of schools of thought on how they are used/purchased. Some folks like the throw-away el cheapos that you buy at Harbor freight, the kind that are supposed to be "mechanics gloves" I can go through a pair of those in an afternoon.
I've known some TD's that have very strong prohibitions against wearing gloves while operating the file
system. Like any machine with moving parts you run the risk of any loose fabric getting caught in the moving parts. I happen to think that this argument is a good argument for well
fitting gloves. Get some medium-heavy all-leather work gloves. Stay away from anything fabric or those crappy faux-leather or reconstituted leather things. Don't get me wrong; Set Wear makes some cool gloves but I'd rather have a decent pair of Home Depot specials.
When you buy a pair of gloves for working the fly
rail make sure they either stay at the
rail or in your gig bag unless you are running a show. You do not want to use them for moving pipe or unloading steel or anything else that is going to get them filthy and greasy. Filth will get in your ropes and grease is bad for everything!
Like I said, I prefer a good pair of Leather work gloves. I really like to put them on, then dunk my hands in some really hot water, then wear then around for a couple hours. sounds stupid but at the end you'll have a really well-fitting pair of gloves, form-fit to your hands.