Tri-met is a great rail system. It serves Portland and the surrounding areas well. The bus system also meshes well and works great with the light rail system. They use the hub and spoke system, whereas the buses go to the tri-met station from all the different location from the town that you are in. I found it very effective and clean.
Bicycle magazine has named Portland and its surroundings as the freindliest bike city in America. This is important to me, as I spent 4 years of college in Alaska with a bike as my transportation. (I did this without resorting to the usual dorky style that bicyclists tend toward.) Unfortunately here the bikers have taken this 'bike freindly' atmosphere to mean they should regularly block traffic. Sometimes Ive seen 3 bikes sauntering down the street each in their own separate lane, next to an empty sidewalk, blocking massive amounts of traffic. Needless to say Im not impressed with that attitude. Other then that I find Portlan, and Beaverton to be nice and freindly.
Traffic is almost always blocked up around 8am, 3pm, and 5pm. Due it looks like to massive flows of people from/to Portland, an inability to merge, and people flowing into badly designed parking lots and intersections. Truly this place has not grown up when it comes to roads. But the people driving here are themselves considerably nicer about it that many other places Ive been, so at least there is that.