Shopping for a new mountain bike a couple years ago, I initially thought I wanted a full suspension bike though was (and still am) intrigued with the fat bikes. I ended up with a Trek Stache which is kind of in between the two - 'mid-fat' so to speak. It runs 29+ 3" wide tires at lower pressure (+/- 10 psi), and has a suspension fork with hard tail. I'm very happy with it but still get an itch a couple times a year to try a fat bike...