I have pretty much same experience. I was on Asics Gel-Blade, moved to Adidas - the one with brown stiff flat sole (can not recall exact name) and when I moved to Mizuno Waves Drive oh what a relief was that.
Can't imagine better and more comfortable shoe.
Very passionate player since young days!
Still learning and playing at least few times a week to improve my skills. :)
Sorry for my bad English.
Have a nice day everyone!