I've told this story many times before.
Sometime shortly after WDADU was released, I saw a snippet on MTV about "other bands you might like if you like Queensryche." At the time, QR was riding high on the strength of Operation: Mindcrime, including being in heavy rotation on MTV. They mentioned three bands: Fates Warning, Crimson Glory and Dream Theater. I took note of those names and set about trying to find albums by those bands.
I found FW and CG fairly easily. I bought FW's current album No Exit and was immediately hooked. I found a CG album (either the self-titled debut or Transcendence), but I didn't buy it because I was turned off by the silly masks they wore and the lead singer's pseudonym "Midnight." However, despite my best efforts, I could not find anything by Dream Theater. After several months, I gave up, but I would occasionally check when I'd visit a record store. Of course, if I had been in the New York/New England area, I might have had better luck, but I was in southern California.
Fast forward to the summer of 1992, and a friend told me to keep my ear open for this song called Pull Me Under. I wasn't listening to the radio much anymore because the local metal station had gone full glam and was in the midst of going heavy into grunge. Nevertheless, I made it a point to listen, and I eventually heard the song and found out it was by Dream Theater. Hey...they do exist! I loved the song and went out and bought the album and discovered that PMU wasn't even one of the best songs on the album. I was beyond blown away. I saw the band live four times between November 1992 and June 1993. After the first show, a handful of fiends spent a good half hour outside the band's bus chatting up JM, JP, JLB and MP (KM stayed on the bus). Fast forward 30 years, and here we are.