If your going to eat breakfast (or brunch for that matter) in Portland(OR), you may as well go to Byways. I should say, don't bother going anywhere else (but why limit yourself). This place is great. The decor is pure travel kitsch with old postcards, state dishes and towels and vintage menus from hotels that probably don't even exist anymore.
The staff are really friendly (but not too friendly). Their baked goods are fresh from the oven and everything I've ever eaten there has been excellent. They used to have view masters at all of the tables but they weren't there anymore. My one word of warning would be to expect a wait after about 9:00 a.m. any day of the week but they've got picnic tables outside to sit at and people watching the Pearl District is fun.