No log for iRacing, but I'd assume it's in the top 3 if not #1 at around 300 - 500 Hours
AMS 1 - 504 Hours
AC - 441 Hours
RF2 - 163 Hours
Raceroom - 141 Hours
ATS - 94 Hours
ACC - 87 Hours
Dirt Rally - 51 Hours
PCARS 1 - 48 Hours (First/only sim until I played AMS 1)
ETS 2 - 42 Hours
AMS 2 and PCARS 2 - 10 Hours
F1 2019 - 9 Hours
Dakar 18 - 3 Hours
F1 2018 - 3 Hours
Dirt Rally 2 - 2 Hours (need to fix this)
Wreckfest, Kartkraft and all the SimBin stuff - less than 2 hours each
So roughly 2000 Hours total behind the wheel over the last 4 years...