I don't have a favorite pant, but for the early season I wear either the Tiburon or Guide Pants. The guide pants have enough vents to keep you from really sweating a ton and are warm for the chilly mornings.
Depending on how much money you have to spend I love the Prana Zions, they have all the same fabric as the expensive hunting pant at a fraction of the cost, and you can find them on sale most of the time for $50 or less. On top of that you can wear them around town. I used a pair last year on an early archery hunt in Colorado with rain and was totally satisfied. I have heard that the new pants they have changed the cut on so they are a slimmer fit. Overall I love these pants and don't have any plans on changing.
I'm clearly in the minority here, but I just run the Cabelas 6-pocket. I picked em up in the bargain cave a few years back for <$20 and they've held up well. Comfy as hell and quite. Not good in the rain but I always have a rain jacket for that.