I went dress shopping for the 2nd time yesterday

I found one I really liked, but it didn't feel like "the one" so I'm going to keep looking. It was the first one I tried on yesterday--at first I thought it felt really heavy & kind of restrictive (it's an allover lace fit & flare) so I tried on more. Some of the others felt alot lighter & more comfortable, but I didn't really like how they looked. I decided to try on the first one again, and it didn't feel quite as heavy after trying on the others & getting used to it.
I'm just wondering how others' experiences were--does your gown feel 100% comfortable, like you can move around freely (and sit down/dance/breathe! haha) ? Or is it normal for it to maybe feel heavy/a little restrictive? If it has tulle, doesn't it kinda feel like the dress is wearing you? I'm sure it depends on the style, and you'll probably get used to it regardless, but I want to make sure I'm not being unrealistic is thinking the dress should be pretty comfortable too.
Thanks!