Congratulations :)
I did the same step 10 years ago and I never regretted it. In the beginning I did have a second machine running Windows XP (which I mostly used for gaming). But just like you wrote there is a great range of indie games available for Linux these days and luckily for me those are the games I'm mostly interested in. And the few AAA games I'd like to play luckily received a Linux port as well (Borderlands 2) or run with WINE.
And since I discovered Lutris, I got actually really excited about the possibilities of Linux as a gaming system.
I also use Lutris as well. I was happy to find out about the program. I also learned that a Lutris is an otter. I took a second look at the programs icon and I was like... "oh..."