I like ones that climb, then I drop. I do not like riding horizontal except at warm up. I do not have a lot of extra time so I can only spend 1 hour or so in the saddle a day. Riding horizontal just does not do it for me. So for me..
1) Stagecoach-Rocky Peak , Hummingbird down loop 55 min up, 35 min down.
2) Chumash out n back, 60 min up, 20 min down
3) Rosewood loop. Climb to Angels Rest 40 min up, top of the world-space mtn down 20 min
Favorite quickie
Space out n 3/4 back, Space out n back (5 min horiz, 50 min climb 16 min drop, 1600 vertical 99% single track)
Wildwood: Stagecoach Bluff, Lizzard Rock drop (60 min, 5 stream crossings, 2 steep climbs, 75% single track)
Happy daily grind trails