Usually prefer to let the bike wear the gloves instead of me. Currently Cyglove pogies.
Why no handgloves? Because I dont get on with them unless thin and fingerless. IME (winter) full-finger gloves can ruin the controls aspect of biking. Even on the singlespeed I prefer pogies than gloves in order to feel/grip the brake properly among other benefits ie never get wet hands and never have to struggle to get gloves off. It only takes a little while of overheating before full finger winter gloves make me claustrophobic and then I have to stop and peel themm off/stow them. Total pain the arse.
Tried the Cygloves at Coed Y Brenin last week and they were just a lttle too warm on the climbs, but they do have some venting so not too bad. Still better than gloves. In the freezing cold it’s a total no-brainer. Can’t see Cygloves for sale anywhere these days, but they were a best buy IMO at £20-£30 some 6 years ago and they still work like new. Other pogies available