Today, I stumbled upon a playlist on Grooveshark named The Day After the Sabbath, over 700 songs. I was surprised to find out it had many rare hard rock classics in it, going towards metal. Plenty of screaming guitars and furious drumming skills. After listening to about 25 songs, I failed to hear even one that would have displeased my taste — instead, I found about 10 new bands to check out later.
Upon further investigation, I found the site from which the songs were taken: http://www.aftersabbath.com/ . It features more than 100 compilation albums (and counting!), made by a guy named Rich. All the compilation albums can apparently be downloaded from there. And if you’re reluctant to do so, you can find the first 5o albums, which should be quite enough for starters, on the following playlist: http://grooveshark.com/playlist/Day+After+The+Sabbath/79920718