I'm not too concerned (at this point anyways) with the best schedules & times & connections - I've been a NW flyer from DC for quite some time now & am used to crappy schedules & multiple connections. As for my locations - it's all over the place - here's what I have on the books for next year already:

SEA
SJC
MBS
BHM
CLT
YYT
DEN
VPS
MLB
SAN
SGU
CVN
PNF
RSW
MCE
GPT
MCO
JLN
YHM
ONT
RDD
CWA
JAX
MTO
PRC
ORF
CDC
TYS
EWR
SAC
PIT
BOI
ATL
DAY
MEM
DTW
GRR
AUS
OMA
BFL
RDU
BUF
BOZ
IDA
PBI
ICT
YVR
SFO

Some cities will be visited more than once - and some cities will require that I fly to a larger airport - for example, I'm heading to SLN (Salina, KS) in 2 weeks, but only US serves it & its expensive as hell, so I'm going to fly to ICT instead - there are a bunch others that haven't been determined yet.

I guess I'm more concerned about between AA & UA, which would be a more fruitful program for me to be a member of from DC (i.e. which would have potentially better upgrades & more mileage opportunity - I'm guessing UA for the miles, but AA for the upgrades?)