Thais don't eat much seafood - pork is very popular. I like spicy Thai food. Traffic was average for a large, busy, city - not horrible like media says. You don't need to speak, read, or understand any Thai at all - in Bangkok, the majority of Thais know some English, and for every sign that's in Thai only, there are 3 with English. GPSs don't work too well in Central Bangkok - too many tall buildings and metal structures.
Transportation is excellent, taxis are everywhere.
Our dollar goes far - on average you get double what you get in the States for your dollar. Exceptions are imported goods - they cost the same or more than they do at home. No crime, no graffiti, no bums, almost no litter, very few beggars - but lots of pushy touts and sales people. And Thais in Bangkok do expect tips from foreigners. Shopping in Thailand is best if you are a small lady, or wish to buy trinkets to decorate, food, or orchids.