Me too! I'm going to use them just for the main plot combats or any otherwise too much complicated maps. In other words I'll use miniatures to enhance visual and/or to keep track of the actions in complicated fights.
For me the whole point of playing D&D as opposed to other RPGs is that I get to pull out my miniature collection, so YES!
I've got a nice vinyl Chessex battlemat with hexes on one side and squares on the other that is just wonderful to use, and I've got a carrying case for my miniatures full of slots so that I can lug the minis I need around. There is nothing better than drawing out a room and then plopping down some terrible monster on the mat and saying "Roll for Initiative!"
I voted "maybe", but by that I mean "sometimes". I haven't used one yet, but not because I'm opposed. I play in a situation where some players are physically present, and some are remoting in through Skype. So, while I can use Roll20 for maps, it's a little more difficult than normal, so I've thus far avoided it.
I use a battlemat and various Flip-mats, since I have a sizable collection of the D&D prepaints (like, all of them). But then, I've been using Battlemats and figures for nearly all my games for over 32 years. It's not an easy habit to break.