Here are some of my favorite album covers. Most of them are also albums I like. As you can see I like powerful warriors with swords, or just stuff that looks cool like Stratovarius's Infinite, or And then there was silence. Symphony of Enchanted Lands isn't an amazing album cover but it looks like something from Heroes III, and just by looking at it you know what you're in for.

For the last spot I was going to put an album cover that had an 18th century aristocrat playing chess against a poor man with a tricorne hat, who is obviously losing and outclassed, but I can't remember the name of the album or band.