What's the best Windows Live wave?

I have no idea what windows live wave is.

a version of Windows Live Styles.

read this section for more info https://en.wikipedia.org/wiki/Windows_Live#User_interface

Wave 5 is the current style we have today, which is Metro…
this Forum uses Wave 4 as its Title bar.

Wave 4 for sure.

wave 2 and 4

Probably Wave 2. I also like Blue Vapor/Flair and Wave 3. Wave 4 is pretty meh, Wave 5 sucks.

Wave 2 was the peak of MS’ design.