For all day outside in the cold I like a thinsulate glove liner inside insulated leather mittens. The mittens keep your hands warmer than gloves and you can take them off for fine work without touching ten degree metal with bare hands. Wool shooters mittens that fold back and have tipless gloves have their use too. The wool keeps your hands warm even when wet.
By the way, if you are going to be on a lift, a layer of cardboard on the floor will slow the heat transfer out of your feet, dramatically.
Way back when I was in the frozen north I had some army mittens that were very warm and had a "trigger finger" slot with a thinner glove on that finger so you could pick small stuff up. (or shoot the bad guy)
I usually wear leather roper type work gloves because they fit snugly and I can still work with them on. They allow me to pick up small items (ok, not flat washers) and keep my hands from getting scraped up or dirty.
When I have to work outside in the cold I like to take a pair of regular work gloves and cut off the fingers between the second and third knuckles. I then put these gloves on over top of the roper gloves. My fingertips are just covered with the thin layer of leather from the first glove, while the rest of my hand is covered with a second glove as well.
I like snug-fitting work gloves; the $10-20 ones at the big box (I've tried a couple different brands, and really haven't noticed much of a difference) are comfortable and warm and are dextrous enough for rough-in, and tough enough to last a few months. After that, I just can't go back to 50 cent jersey gloves or $1 leathers...