I'm going to chime in too! I think it's more about the feeling you get in the dress than what it actually looks like and where the ceremony will be (beach, winter, church, etc). I wanted a very simple dress, no pick ups or anything on the bodice, and when I tried on my dress (which I didn't like in the dressing room!) I fell in love! Honestly, I was like a little schoolgirl with it on...but I didn't buy it.
I went back a month later to try it on again, and another that I really liked (which was also less expensive) and was trying so hard to pick the less expensive dress. But when I put it back on...my face lit up again.
You just know it when you try it on. And no matter how much time passes, it feels the same as it did the first time you try it!
As they said on Friends, there should be a job where we could wear our wedding dress every day! It just feels great to have it on!