For real, tinnitus is no joke, I have a pretty serious case of it myself from years of playing in bands, DJ'ing, and going to shows without using proper hearing protection. I swore that earplugs affected my playing and enjoyment negatively, but not nearly as bad as the constant ringing I hear all of the time affects my life now. Conversations in any kind of crowded room are almost impossible for me to follow now, yet people speaking at slightly louder than normal speaking volume feels like an ice pick straight down my ear sometimes. It's also worse in my right ear because in my band I was always stage left and had the cymbals blasting my right ear out for the better part of 10 years. It's really no fun at all.
Do yourself a favor and pick up some earplugs next time you go to a show, no matter how lame or old you might feel. You also should definitely keep a close eye on how loud your headphones are while you are DJ'ing, I know I had a habit of letting my phones get louder and louder over the course of a night, and the next day I would turn on my mixer and be scared how loud they were. I bet more than a few of you do that too, and it's murder on your ears, especially if you've been drinking.
The only thing I regret in life is that I didn't protect my ears when I had the chance. Take care of yours.