Currently 17 and I have done a lot of traveling in my lifetime. I do personally prefer to do things that I will enjoy as opposed to just upping my credit count. Phoenix has a small amusement park called Castles and Coasters with 3 or so credits, but the place looked dire, so instead I hiked Camelback, visited Taliesten and the botanical gardens, hand had the most rewarding experience possible. I still have over 200 credits, though - my life goal is over 1000. I still need to get to Japan, Scandinavia and California!