1. I use kidskin gloves for thorny plants - it's very hard to pierce kidskin with anything at all, even the spikiest of plants, and I grow some spectacularly spiky things (like Euphorbia milii
, Szechuan pepper, and Cat's Claw
2. I like what are called [url=https://www.leevalley.com/en/garden/page.aspx?p=51131&cat=2,42407,33246&ap=1]Bionic Gloves[/url], which I bought at Lee Valley Tools. They're Cabretta leather (fine kidskin) with grippy neoprene pads on the fingers, and they're super-comfy. They're also one of the few gloves that come in the ridiculously small size that fits my hands. My current pair is about 5 years old, and even with constant heavy use (they're my general work gloves of choice) they're holding up very well.
3. I like Nitrile gloves in the lab, but not for gardening. They don't breathe nearly as well as leather does, and I find that I get "glove-stink" from wearing them in the heat. They're also not strong enough to stand up to the abuse of very thorny plants - I've had Bullhorn Acacia go through them like I wasn't wearing anything at all.