I didn't know that people play techno at 150+, I thought it was just a few extreme hard techno DJs! I've become bored of overpitched sets by DJs, who want to bulldoze the club using any means necessary, even if it means playing at ridiculously high tempos (as if that contributed to the "hardness" of the music).
Personally, I think that the tempo doesn't really matter. I produce tracks with tempos from, say, 132 BPM to 145 BPM, tech-wise (not otherwise), but I usually set the tempo only after I've made the basic loop. Sometimes I even make a percussive loop at a lower BPM (70-120), then push up the tempo and go on from there - so I couldn't say what "my BPM" is... Although when spinning, I admit that I prefer a tempo somewhere from 137-143 BPM, simply because that's the tempo I'm most comfortable with while playing... So maybe I have "my BPM" after all, hehe...