While I don't agree that just because I'm fed up with mega down-tuning then everybody else must be too, I think Davey has a point: You can achieve plenty of heaviness with E or Eb tuning.
Over the years I've tried all sort of tunings, C was my "standard" for several years & I went as low as A. But all the different gauges of strings & different setups got a bit of a pain in the arse after a while, so I've settled on Eb as my standard tuning.
I find that once I go lower than D that I'm compromising on speed & precision - either the strings are flapping around all over the shop, or I have to use such a heavy gauge that it becomes tiring to play (OK, a decent setup would solve much of that, but IMO 13-62 is harder work than 10-46 for really fast alternate picking & palm muted riffing no matter how well you set the guitar up).
Davey - it must me a sign of ageing but don't worry, it comes to us all. Welcome to geezer-dom :P
JMHO, YMMV etc...