well, I think i'm the newest of you guys. My story goes like this:
year 2009: I was 10 then. I received a Wii and Guitar Hero World Tour. There was Pull me Under on it. Didn't care at first, as most of the band I fell in love with
year 2011: 12 y/o. At my drum school, here in Italy, my teacher says "Hey, wassup, Mike Mangini's coming for a clinic here!" and I was like "Who is this guy" "Dream Theater's new drummer!" "Oh, DT, I heard a song some time ago." (Note: at that time I was really getting into the metal scene, listening to the big 4 of thrash, and some other bands too) He showed me some videos of Mangini rockin' his giant kit. I was shocked by his talent and the massiveness of his kit (is that even a word?). So, along with this, there was a fellow drummer of mine who was a big DT fan, and he was constantly playing the drum rythm of Under A Glass Moon. He was totally obsessed with it. So the actual first song I really heard from Dream Theater was UAGM.
year 2012: in the studio with my school, my friend played Trial Of Tears. This was a bad move for my unborn interest for DT, UAGM didn't hit me musically, and I thought "Man.. this song is boring.. maybe DT aren't my thing". This was up until the MM clinic was starting to get near. I thought "Man, I have to get documented about him and what he did in DT". So I watched "The Spirit Carries On" documentary. Fell in love, but not so much, with The Dance Of Eternity.
Enter Mike Mangini, and his awesomness. The guy was extremely hilarious and so much talented. He played a 20 min. drum solo which was like
and at the end of the clinic he played a song from ADTOE. That song was Outcry. That song: the metal/epic elements, the insane instrumental section that Mike played like if he was drinking a glass of water, hit me so much. I fell in love with DT since then. I feel like the most lucky DT fan because I fell in love with the band and like 10 minutes later I got an autograph and a photo from their drummer.
My first album was Octavarium.
year 2013: after learning every song from the catalog, in January JP announces the new album. I was like "New album = tour = concert nearby". And yes, I did it. I bought a ticket for the Rome concert this January, and when the ticket arrived I looked at it. It said "An Evening With Dream Theater". I almost fainted when I noticed it. 3 whopping hours of concert are waiting for me in 6 months. And a new great album in even a shorter time!
oh, I love this band so much. I also think I improved a lot in technique as a drummer. Also, they opened me a whole new scene, the prog scene. I was already a Rush/Pink Floyd fan when I started listening to DT, but they brought me a lot of other stuff: Opeth, Porcupine Tree (another clinic-event with Gavin Harrison, in which I did the translator for him
) and the side projects like LTE, Adrenaline Mob and recently The Winery Dogs. Currently I'm in a DT/Porcupine Tree period, because I'm listening to PT just to make time pass up until September. At that point new album to the max and at January concert
tl;dr: Mike Mangini did a clinic, played Outcry, fell in love with the band after a few months of doubts.