15th anniversary is quite nice, I have had a few of those. Also heard good things about the decade. There is always the vintage 1990 that tends to be a decent smoke although I havent had one for a couple of years now.
RP 1990, 1992 & 2003 Vintage, along with the 15th Anniversary (definitely grab a few 15's) are great cigars, and are ones that I would pick up at a RP event. I haven't tried the sun grown or royal, but I'll probably grad a few of these next time I place an order just to try them.
I happen to like all the cigars you listed specifically, so our tastes may be similar. All the RP Vintage lines are tasty, with the conny 99 being my fav. conny. That being said, the Revolution and Old World are both misses for me. Hope that helps. Haven't had a bad Decade or Edge yet either.