For Intermediates: Catchy Heavy Metal Song Reviews. I Walk Beside You by Dream Theater

This would be the token easier song that Dream Theater usually puts on most of their albums and releases as a single.  That said, I think that at the time, this was their best token easy song to date.  If you are interesting in learning the Aeolian mode, which is the most common minor scale, Dream Theater is a great place to begin study of this scale.  They use it in almost all of their songs, usually in the key of E.  Yet, they maximize the use of the scale, such that very few bands could ever hope to player a song that is beyond the level of one of their albums token easy songs.  Token easy for Dream Theater is at the intermediate level!