Absolutely. Here's the list, so far:
1. A circular stone fort. The diameter is negotiable, as long as there is room for a fight on the inside. There is no roof (or at least not much of one), and a huge V shaped gash is carved out of the side. The bottom should be no wider than a medium-sized person can squeeze through.
Inside is a single stone pillar of equal height to the fort (I'm thinking 50 ft or so?). Eventually the stone around this pillar will collapse to reveal a tall spiral staircase with a single door at the top, seemingly opening into nowhere.
There will be two encounters with this map--one before and one after the revealing of the stairs.
2. A section of forest, possibly with a stream and felled trees. The object here is for the difficult terrain to be a major factor in the encounter.
3. An area of swampland, mixed with a bit of woodsy terrain. This could be worked into the above map if there's a bit of distance between them. This will preferably have a darker feel for flavor reasons, but it's not necessary.
4. A rocky badlands area, or desert (think gnolls). Actually, Dorpond's bluffs map could work well for this.
5. A snow-covered cemetery. Two encounters here, and the only requirement is that there be two hanging bodies--a man and a woman--nearby. A newlywed couple would be great, but not necessary.
6. This will be the simplest one, but also the one with the most intrigue, I think. A hallway, 4 squares wide, with a single door at the end. It should be of a length to take longer than a couple of cautious rounds to get there.
Some sort of 5 ft. grid should be placed in the usable space on each map.
And if I run across some that fit my needs, I most certainly will. Most of what I'm thinking has at least one fairly specific item though, and I think I'd be hard pressed to stumble upon something that fit exactly. Of course, I could always change a bit of the encounter if the map was close, but I'll cross that bridge if I come to it. And no, a consistent style is most definitely not needed.