Favourite cafe - Townshends Tea House (I'm sure they have amazing tea but I tried and loved their Coconut Mate Latte). The cafe in Powell's bookshop (which is a must visit for any book lover anyway) is a close second purely because you could browse for books and then bring a few in to the cafe to read in case you might like to buy them.
Favourite stroll - by the river to admire Portland's bridges.
Favourite beer - Rogue's hazelnut brown nectar (and Portland has some great beers)
Bridge and blossom spotting along the river
America's Bill of Rights
And back on the train again and for my first overnight on the Amtrak