My favorite ratchet often depends on the task at hand. I think my favorite, favorite ratchet is the MATCO 88 tooth comfort grip locking flex head ratchet in 1/4 & 3/8 drive. In 1/4 drive I have 6, 9, & 12 inch long versions. In 3/8 I have 9, 12, & 15 inch long versions. You just can't beat the thin head on MATCO's. I also like the crisp 88 tooth ratcheting action.
I also really like tekton's 90 tooth series ratchets. I picked up the newly released 3/8 & 1/2 drive flex heads. One thing that I like about tekton's ratchets is the shape of their all metal handles. Often 1/4 inch drive ratchets have handles that are slightly thicker than a number 2 pencil. Tekton handles have a little more meat on them. I like their shape, feel, and balance.
I own ratchets from most manufacturers but, tend to gravitate to MATCO, Tekton, & Carlyle. As with all tools, you might not like what I like and I might not like what you like but, that's what makes choice and availability great.