While I hate anything matchy-matchy, I’m also a minimalist who likes to keep certain things very simple. In the realm of bridesmaids dresses, that means I’d love to pick one, easy, simple dress that fits everyone OK. However, I like the idea of giving them a color range and letting them pick their own dress somewhere retail to avoid matchy-matchy, to keep them happy+comfy girls, and to hopefully keep the costs down. One problem will be finding the colors I like retail, but that’s for another post.
I have nightmares of the 80’s dyed-blue carnations (don’t get me wrong, I might actually use them as I like them when used properly, but just say no to dyeing flowers) and hydrangea (very pretty flower, but the blue ones are a little too purple for my taste). Therefore, no blue flowers for me. I think I will stick to mostly red flowers since Asian “adults” have a thing with white flowers being for funerals. Plus, I like how red pops in photos.
I like this overall look, from the most recent InStyle Weddings [Winter 2007]:

[The colors for all except the leftmost one with "streamers" (that actually look like her halter's come undone) are within the range I'm thinking for "soft aqua."]
They can then carry bouquets like the following (the little one and the big one is a little too vintage/garden/rustic/leafy/some-word-I-can’t-find for the look I’m going for):

[I do like the bouts and proportion of porcelain berries (the name of the flower, they're not literally porcelain) for a little blue in the nosegay, too. Also from InStyle Weddings, Winter 2007.]
Anyway, the pretty pictures make me digress. Are three bridesmaids too few to do the mix-and-match thing? I think it looks more fabulous the bigger the bridal party from past photos I’ve seen. For illustration purposes, see my friend’s recent wedding below.

[It looks ok, but it's not meeting the vision of ideal bridesmaid "look" in this wedding-obsessed head. Maybe if I keep the skirt lengths the same it won't look as piecemeal...]
I was one of three bridesmaids in a wedding recently. The dresses we wore were the same fabric and color and the skirts were all the same, but the tops were all different. I liked the effect–not too matchy, but similar enough to feel bridesmaidy.