I used to have all my stuff beta read but not so much now. It kind of depends on what it is. If it's a PWP that I'm trying to just whip out, or if I know exactly where I'm going with the fic and it isn't too long, I might not have it beta read. My SPAG is pretty good -- tho it's always good to have stuff proof-read and I do try to have that done -- but I find the times I really need my betas is when I'm having trouble with the story idea, or the style, or the POV, or something's off and I can't figure out what it is.

Me, I wouldn't bother on a drabble, or even a small ficlet, but then, I usually don't write short pieces.

As a general rule, I like to have all my stuff beta-read, but if I'm sure it's the way I want it, or I'm on a deadline and simply won't have time to make any changes, I'll send it on without a beta.