I have been making music on newgrounds for long enough that it makes me feel old. Many things have changed, like the fact that my music isn't completely terrible anymore, but one thing hasn't:
"THIS NEEDS MORE BASS!"
Four years ago in my AP Music Theory class, I noticed that I was able to very accurately deconstruct and transcribe 4-part harmonies... except the bass. For notes near or lower than C3, they blurred together into an indistinct mess, making it impossible for me to decipher them. I thought, perhaps, this was just the shitty sound system we were using, but none of the other students had any trouble with the bass at all. I began to get suspicious - I had never really liked bass, but my only experience with it was either a blurry, indistinct rumble, or something I could feel, and if I could feel it, chances are the music was way too loud for my liking. I have sensitive ears, and listen to music (and everything else) at a significantly lower volume than most people. Hence, by the time I can actually feel the bass, you are probably bothering my ears.
Unfortunately, having sensitive ears doesn't have any advantages. Testing with a sine wave indicates I can hear up to 17.3 kHz, and down to 60 Hz, which is perfectly normal. This, however, didn't help me when someone sent me a song and asked if I liked it. I said it was boring. They asked about the bassline. I said "What bassline?" Just for fun, I took one of my more bassey songs and started cutting out some of the low frequencies. I couldn't tell whether the filter was on or off all the way up to 160 Hz.
This indicates one of two possibilities: Either I never listen to things at a high enough volume to really notice the bass, or I can't hear it. Either way, everyone always tells me my songs need more low end, but short of putting my foot on my sub or looking at EQ levels, I really can't tell what they are talking about. I'll "improve" the song to closer match their liking without ever being able to tell the difference. I can go to a venue with obviously properly configured bass and I still can't hear it. Naturally, this means everything involving bass is completely opaque to me, because its just thumps and rumbles, and that's if it isn't making my ears bleed. To this day I have no idea what the difference between muddy bass and not-muddy-bass is because I can't hear it.
As far as I can tell, my musical experience is missing a component that many people seem to consider extremely important. It also means my avatar is almost as ironic as my love of techno music is.