Overall in my life (22yo), going by steam playtime (4200h) - 2.1%. Going by class hours (2300) - 1.2%
In the 6 years that I've been playing, 7.9% by steam playtime, 4.3% by class hours.
And that's just game time, you can't forget about tftv, twitch and waiting for pugs/lobbies
Eh, 5% of my time in the last 6 years ain't bad for a hobby. Idk why everyone sees it as depressing I mean fuck, you literally sleep through 1/3 of your life and imagine all the time you "waste" by showering, shaving, brushing your teeth, cooking, vacuuming, doing laundry, commuting. If you wanna look at life that way, 5% of your time on a hobby isn't much at all.