I'm a big fan and frequent user of PDX. I can't comment on pax drop-off as I usually take the MAX from downtown- clean cheap easy to manage with roll-aboard luggage. TSA areas show a pre-2001 design with post-9/11 security added where it could be shoe-horned in. TSA Pre is usually quick as long as there aren't too many random selectees who need to be told to keep their shoes on coats on don't take out laptops etc. for some reason this seems worse here than at airports like SJC or SEA. Dining and shopping options are excellent for an airport this size and with this traffic. The airport is apparently changing out a number of mainstream concessionaires for local vendors including several food carts in the terminals. Prices are same in the airport as outside and quality is also generally consistent with outside vendors. The terminals are bright broad and high so there is a consistent feeling of openness. It's a very pleasant airport to be stuck in.