first 2 thru hikes i had some blisters, i was wearing Montrail moraines, i believe they were considered heavy mid weight boots. had a heel blister so bad once i cut a huge hole in the insole where my heel was, then believe it or not i removed the insole completely and my foot rested directly on the hard plastic waffle middle sole for hundreds of miles, in 2002 and 2003 i switched to Chaco Sandels, some times i had really dried out feet, which can hurt as much when the feet are severally dried out. but some times i would wear socks, or no socks, my favorite was socks and seal skins & my low cut out door research gaitors, i could cross creeks and my feet would stay dry,never needed camp shoes my system was so comfortable, and when i hiked in the seal skins just enough moisture would stay inside my feet would not dry out. i like the thought of keen sandals with the rubber protection up front, i have never tried them, i thought they were for skinny feet. many of times i'd be hiking and a stick would jam between my feet and the sandal, thats not too much fun. i never seemed to kick any rocks with my toes, but sometimes stepping over rocks,logs and such i would bang my heels on the back swing. i wish they still made the quality Chacos with the soft vibramn bottom soles but they don't :-(