The most memorable one from when I was younger was Janet Jacksons Janet. Propbably the only cd cover I took from my mom's collection, I don't know why but I use to think she was way hot.
Tool - Tool - Ænima
And because It was my favorite album of all time I'd have to say the Sublime self title. I spent hours looking through that booklet with the lyrics.
anyone who says Nirvana with the baby underwater and the little weewee hanging out is kind of a perv. i liked the music but not that album cover.