I order 10-12 mil latex gloves. Yes they are more expensive, but they tend to last at least 2 days of constant use, where I blow through the cheap gloves in a box from anywhere local in sometimes minutes.
Latex is a bit stronger than Nitrile.
We keep a bottle of Gold Bond next to the box of gloves; a little sprinkle and they slide right back on like new.
I made the mistake of ordering black gloves once. Cool and all, but I couldn't see when my hands were covered with filth before grabbing something I didn't want filthy.
If I need anything more resistant to chemicals, I use cheap kitchen gloves from the grocery store.
These are my favorites at the moment: http://www.microflex.com/Products/SG-375.aspx