If you're happy you're not missing anything. If you're using your computer and the computer itself isn't the hobby, you're also not missing anything. If you're an enthusiast, or super curious, you're missing out.
I've been doing this nearly three decades at this point and have at least tried most things, often for years at a time. I use Mint today because I have other things to do now than play computer (rather I'm paid to play computer for someone else). Before that was Fedora, but the release cycle is too short for me and there was a risk of messing up my system in a big upgrade every six months (rare as it is). I like Cinnamon because it has sane defaults, just enough customization without being ridiculous, and very little distracting swooshy effects that look janky on older computers, and Cinnamon runs best on Mint imo.
Trying new things has been very beneficial in that I'm familiar with most things and can use anything, but if I worked in marketing or something that wouldn't matter much.