TL;DR: Is it acceptable art etiquette to commission original characters at the artist's alley of anime conventions? Like, if you personally were tabling, would that be ok with you?
Context: So I'm totally planning on coming out of my dark cave and doing a proper update/commenting/maybe actually posting some ART, but until then I was hoping I could peek out and get some opinions on something? This year I'm planning on going to Anime Expo for 2 days (with a friend!), and one of my favorite parts of any convention is the artist's alley! I even added a bunch of corkboard squares to my wall to accomodate more prints. The next step is to cork the floor and ceiling. And bed. Never enough cork.
NOW, a lot of artists offer commissions at AAs (duh), and I absolutely adore hard copy comms but they're tricky to come by online, + shipping. So my Q is, then, is it ok to specifically commission OCs at conventions? Maybe artists offering comms are more practiced w/ fandom characters and don't anticipate OCs? Less practice = more work? On-site rates for commissions = cashing in? If you're tabling at a big con like AX (50k attendees) though, I'd assume you're pretty experienced/know what you're getting into, so yeah/nah on the commissions? I've been through these pre-con jitters before whoops, but I'm still not certain, so... outside opinions would be good! Bonus points if you've ever tabled before! It'd be cool to know what the types of comms people ask for are like. 8)