Started growing one around the beginning of December. Initially, I was going to go full beard/mustache combo, but my partner asked what I'd look like with just a mustache so I shaved the beard and never looked back.
It definitely makes me feel like I'm treated with more respect, but that's probably because it makes me look closer to my actual age than without it. (I'm 28, btw, most people think I'm fresh 18 when I have a shaved face)
It's not for everyone, but if you can get yourself to just do simple maintenance (trimming) then go for it.