miniatures loony
Miniatures. Got em, use em, flaunt em.
I've been using miniatures ever since I learned the game (20 yrs now) when the people who taught me used grenadier D&D figs and dominoes to represent dungeon walls.
I've used (and prefer) dry erase battlemats (hex and square) for speed and ease of play. I'm a miniature wargamer so I've got a huge closetfull of unpainted figures too.
I've used old Games Workship and Steve Jackson Games cardboard cut-out dungeon floors, and they're a really nice looking alternative to the battlemats. Oddly shaped rooms or encounters still have to be fudged using these, so a battlemat is more versatile.
I use HeroClix and a battlemat, as well as hundreds of cardboard heroes (by Steve Jackson and made on my inkjet printer) for superhero games.
I had a full set of Master Maze handpainted resin walls. These looked fantastic, but were expensive, harder to customize than the dungeon floors (especially for oddly shaped encounter areas), and time consuming to put together during play. The walls are kind of high and it's hard to get your fingers into crowded corridors without knocking over figures too. Plus, after spending $300, I could only make a small dungeon with them! I mostly used them for GW Mordheim Sewer battle wargames.
Ainsty (sp?) and a couple of other British companies make resin unpainted dungeon & sci-fi floor tiles with low walls so you can pick up your minis easily. They look good too. There's another US company that makes "pour your own" resin kits to mold your own massive numbers of dungeon wall/floor tiles. It's cheap, but you have to be ready to make lots of tiles and paint them up.
But enough of my rambling. Yes, I always use minis. I require players to listen to descriptions carefully to know what's going on in the encounters. I like the visual spectacle, but it's still secondary to the role playing aspect of the game.
I do use scenery, but only get fancy when the PCs are facing a really important foe in a battle that's a major turning point in the campaign. Makes things memorable.