Nice 5.6's: Geronimo (4-5P), watch the rope snag on way down. Cat in Hat is overhyped IMHO - only last pitch is good and that's not enough to justify waiting in line. Johnny Vegas is OK - sketchy pro. on P2 above dihedral. Quick climb (rap route instead of Solar Slab gully which takes longer). Solar Slab is supposedly nice but I haven't done it. Physical Graffitti is short and sweet.
Nice 5.7's: Olive Oil is OK (bit overhyped maybe??); Tunnel Vision is very memorable; Group Therapy is nice - scariest part was not the OW (which is soft as in mostly face climbing no real OW moves. the crack would need like #5 Camalot to protect though) but the runout P1 (~5.6 face). Also, when getting off belay to start P2, head up a "groove" on left (this was the only "tricky" bit of routefinding).
Nice 5.8's: Crimson Chrysalis (forget the 5.8+ rating...it's all uniform from bottom to top at .7+ - .8). Dark Shadows (first 4 pitches; easily link up P1 and P2). These are MUST DO's at RR!!!!! Unforgettable routes!!!
Lotta Balls is a decent 5.8 (it's not runout) as is Frogland.
Nice 5.9's: Epinephrine (have not done it though). Ginger Cracks looks good as well.
Nice 5.10's: Ask someone else.
Good websites to check out:
http://www.ericandlucie.com/Climbs/climbs.htm (much good beta with nice photos)
http://www.gdargaud.net/Climbing/Nevada.html (not that much beta but awsome photos)
http://www.summitpost.org (look under NV peaks, Rainbow Mtn. etc...).
Get the updated RR supertopo.
Been to RR in all seasons pretty much. Nov. is just fine for any route (N facing included) though it did rain on us 1 out of 4 days. Short daylight is a pain in the a.. - make sure to call in and get that late exit pass - it's free and effortless to do (even from the top of route) and you'll save yourself $50 on the ticket (got it everytime otherwise).
Also, Todd Swain is a good guidebook but for a more complete picture get yourself the Urioste guide as well (out of print). TON of routes in that one that didn't make it into Swain.
If you're gonna go for that Jubilant Song on Windy Peak, the TH might be tricky to find. Let me know, I have very detailed directions (went there but ended up not doing the climb).