AS vs DL vs UA

I live in SAN and have CJOs/CTOs for all 3. Which would you choose and why? I know AS has a base in SAN. UA has a satellite base that could take 5-6 yrs to get into (from what I read!). DL no telling where but I can commute and hear dropping trips are easy and you get mixture of lime and A-days(reserve).

I'd love the opportunity to do international routes which likely won't happen out of SAN. Not sure if any allow trip pick ups out of bases that at aren't your hub.

Any insight would be greatly appreciated! I wanna go the long haul and not bounce around!

TIA