Ambient noise is the bane of audio listening sessions. It's why, in my crappy second floor apartment, I rarely listen in the summer when the AC is on. It's a wall unit and shares the same space as my stereo making it impossible to fully appreciate the music.
There are times when I'll go as along as two weeks without listening as it frustrates the living hell out of me. Then, when I can turn it on, the event is almost an epiphany.
I can imagine and appreciate what a junkie goes through to get that fix.
All the best,
Nonoise