Steampunk for me is kind of "meh", I run hot and cold on it. Some of it is cool, much is simply absurd.
30's, 40's, 50's, and even 60's and 70's "Retro-Future" is what does it for me. Taking the old tech and putting it as the "face" or UI for modern guts is cool. At least in the electronic era, many people had visions of what would be possible, and wished their hardware could do it.