I've lived in Portland for about 5 years now, though I haven't seen many of the sites. Just wandering around downtown can be pretty fun sometimes. If you're into beer or wine there are a ton of microbreweries and wineries in the area. The Powell's books downtown is also pretty cool, IMO.
Some bonuses I liked after living in Dallas, TX: The beach, mountains, and forests are all a short drive away. Riding a bike and using public transportation (Trimet) is a viable option, which is how I got around my first year here. People just seem to be nicer.
Day to day life depends on you. For me, my day usually consists of fitting in a jog, going to work and/or class, housework, studying, spending time with my girlfriend, reading, and playing games. Once or twice a week I'll meet up with some friends for some movies or games.