I can only speak for Wyoming, but it depends on what and WHY you would consider something important to avoid. For me, there is no way in hell that I would live in Rawlins unless it was the absolutely ONLY way I could stay in Wyoming. However, I know many folks that live there and you couldn't pry them with out with a truckload of TNT. Sooo, it depends on WHAT is important for YOU to avoid.
The Rock Springs/Green River gets a bad rap. We lived there for 2 years and although it wasn't ideal for US, I would move back if I had too. Casper and Cheyenne are the 2 biggest cities, without about 58,000-ish population each. They have all the necessities you need. There are a few 30K-45K population towns, a few 20K-30K towns, a few 10K-20K towns, and a LOT of 1K-10K towns. Just remember this rule-of-thumb, most towns larger than a few thousand people tend to be "about" 100 miles apart due to being founded and built as the railroad moved west, in 100 mile sections. YES, that is real, and it is true. The Old West heritage is part of our life, and we tend to cling to it and protect it fiercely. Happy hunting.