Charlie,
I'm with Cory, I'm more a jeans and T-shirt kind of guy. My wife has to wear dressy clothes every day for work, so I greatly prefer to see her in jeans or casual clothes. Fancy dresses don't do much for me...
See www.uglydress.com
When I go to a wedding or some other event and see a gal all decked out in some fancy outfit, the first thing that pops into my mind is "Snob".

But a gal wearing a simple dress (not "old lady", not too "sexy", just comfortable) or jeans and a nice top turns my head every time. I figure, here's a gal who isn't trying to prove herself to anyone. She's REAL. That's the kind of gal I find attractive.
Of course, if I pick out something for my wife, she usually says one of two things... 1. "I can't wear that to work. It's too casual". 2. "I can't wear that. It's too revealing".
Don't get me wrong, I really enjoyed the dresses you showed

but I have no clue where you'd wear something like that. My wife has a few items like that, but she keeps them just for recreational purposes here at home.
I like the first dress RW posted. It looks like something I'd realistically want my wife to wear outside the house.
Just for the heck of it, I did a quick search to see what kind of dresses I found attractive. Here's a few I saw on Amazon.com:
I like the flower one best, but that's me. I'm a guy.

Probably boring when it comes to popular styles?
GT,
> very classy look.
I guess it's my situation. My wife works with lawyers and "fancy-pants" people all day long. I've encountered more "class" than I ever care to.

I'd much rather hang out with normal, down to earth people.
> what is it with men and high heels anyway?
Again, I'm weird... I don't particularly care for high heels. Does nothing for me. Always reminds me of a porn film where they're completely naked on a bed or on the beach, but they have their high heels on?
Sure, some heels are attractive, and they do make your legs look longer. But who came up with the idea that walking around on your tippie-toes was attractive?
I don't want my wimminz in the kitchen or pregnant, but I sure likes'em when they're barefoot!
Anthony
P.S. "Anthonys Scale of Dress Lengths"
1. Touching the Floor - Grandma...
2. Below the knees - Funeral...
3. Knee Length - Work Wear...
4. Above the knee - Date Night...
5. Hip Length - Slut...