I realize this isn't a strictly OnePass discussion, but it IS related in the sense that I have been primarily a CO flyer for a number of years now, and would much rather hear the opinions of folks who have similar experiences (and who I "know") than on some of the other forums. Many of the posters here have more credibility to my experience after reading for a few years and posting the last year...so advice is solicited...and if you want to make fun of me, that's fine too.

Development: New job that has 20-50% travel reqs. Travel is wherever the customer is, International included. Probably more domestic travel than Int'l, but it could vary. Most Int'l will be Asia/Europe. Int'l segments over 7 hours are paid for in J. Home base is SEA. Bookings are through Corp travel agent (AmEx).

Current Situation: I am OP Gold through my own dollars for the most part, with only the rare business trip prior to this new job. I have decent opportunity to acrue OP miles here. EVA and Korean to Asia, NW to Asia and Europe, and domestically Alaska to much of the west coast, but without upgrades, and possibly CO to some of the smaller European ports.

Possibilities: Taking a second program in either of the other two alliances, neither of which seems obviously stronger than the other from SEA. (Hence the post.)

OneWorld: AA to hubs and onwards (often at or near the top of the booking lists AmEx gives, no matter the destination) BA to LHR and onwards of course, which is appealing because of their J product.

Star: Asiana to Asia, SAS to Europe (wireless, for now!) US and AC to sundry specifics, and of course UA. UA has the most singular appeal of any airline here, for numerous reasons, E+, the multiple semi-nearby hubs (DEN and SFO) and the fact they mini-hub out of SEA.

The question is, with an irregular travel schedule, is it worth taking the second program on at all, or do I try and keep my miles inside of OP, where I will still probably go slightly insane trying to use my miles...but where a ton of my personal travel will still be directed. This is the definite drawback to SEA...it's not obvious who to go with here if you have/want Int'l travel.