Definately Sl@ng!

It's a damn shame how underrated it was both with critics and Def Leppard fans. I liked the way they were going with Sl@ng and wish they continued with a similar formula from then on, instead of taking a step back with Euphoria. (I've not heard it yet, but aparently it is typical Def Leppard)

However I was impressed with X when I bought it in 2002, as IMO kinda blended slightly the typical Def Leppard sound with the experimentational Sl@ng sound.

Sl@ng also had a much more laid-back sound and the songwriting was the best I'd ever heard from the band instead of just the cheese-metal lyrics as from previous albums.

I hope when they release their next album (which I've heard is due sometime this year or next) that they do a similar album to Sl@ng and perhaps incorporate a more modern rock sound.