[bruceb]

SeaTac can go directly from Capitol Hill via the rail and not worry about traffic. Can't do that with Paine Field.

[darknavi]

Light rail is a huge boon for SeaTac, that's for sure.

Security and the whole "get to the gate" process is just so easy at Paine Field that it's hard to go back if your flight works out there.

No lounges is a downside though.