Right, so I'm sure my numbers won't be up there, because I only started playing relatively late in life. I had a familiarity with the 3e and 3.5e rules due to CRPG's, namely Neverwinter Nights 1 & 2, but only started playing after my brother returned from varsity, and bought himself a 5e Starter Set back in 2017. He started playing in his final year, so he wanted to continue when he got back. I rustled up some fellow interested players from our Marvel & Movie Watching Group, and we all sat down for our first DnD game in December 2017.
We generally play twice a month on Saturdays or Sundays, for at the start around 8 hours a session, usually either 14h00 to 10h00, or 11h00 to 19h00. Our longest session was the penultimate fight of the first campaign, which was 14 hours, from 14h00 on Saturday to about 04h00 on Sunday.
Based on my calculations, that first campaign ran for about a year and a half, and I clocked up about 302 hours in playtime as a player.
I then volunteered to DM a short interim campaign to give my brother a bit of playtime, and give him time to set up his new campaign. My quick 6 to 8 session campaign morphed into a much bigger one, as his prep didn't finish on time, and everyone was having fun. So about 10 months later, I had DM'ed about 128 hours, then the pandemic hit.
I moved everyone over to Roll20 and be continued a month later. Online put a bit more of a strain on people, so session time was reduced to 6 hours, either from 11h00 to 17h00, or 14h00 to 20h00. The shorter time was also a hit with the wives, who definitely was not amused by our 14 hour session the year before. By the time the campaign ended, I'd DM'd another 144 hours online. Roll20 indicates 191 hours, which indicates I spent about 47 hours prepping there for games, or about 2 hours per session. I don't think that counts as playing, no?
My brother's new campaign started in-person, and we've had about 18 hours of playtime since then, but we're now moving back online - with the other DM having to figure out Roll20, as a third wave has hit the country just as the vaccination programme picked up steam.
So I'm sitting at:
320 hours In-person Playtime
128 hours In-person DM
144 hours Online DM
592 hours approximate total time in the last 3.5 years about.
It's about 170 hours a year, which seems in line with most of the reports here. Or roundabout 21 days of sessions a year, or a solid week of non-stop playing comparatively.