I like Doc Martens or Justin boots. The rubber soles have great grips, and aren't too heavy..
I want a pair of boots like Russ' the big snake boots! ahhahha

Thanks for the input so far, guys.  My impression about combat boots was also that they weren't built for comfort, but some of the newer models by Belleville look like they have made improvements on this.  I also emailed Belleville to ask their suggestions based on my criteria.  Top features that I am looking for are steel toe (or composite toe protection), waterproof, lightweight, and good traction.

I know these companies offer many styles, but I don't think I've ever owned shoes from either company.  My last boots were Danners and I liked them for the most part, but they were lower-cut like most hiking boots I see in the stores anymore (and I'm looking for something a little taller this time) and the faux leather parts didn't hold up well.

I had a pair of boots similar to these once and (personal preferences here of course) I just thought they weighed a ton and the overly high heels kept catching on every stick and tripping me.

I know some people just like to throw on a pair of tennis shoes for herping...which would have the advantage of being lightweight, but not too good on foot protection.

Wesco makes the best boots I've ever owned. They are all hand made with the highest quality materials and workmanship, very comfortable, have excellent ankle support, come is several different heel and upper heights, and soles  that match your traction needs. I used them working as a lineman for PG&E in the Sierra's for years. They are a little pricey, but considering the wear you get out of them they are well worth the price.

I have Cabela's snakeproof boots. I have been very happy with them.