If back-to-school time has inspired you to get more serious about your workouts and you're a hit-the-gym-for-a-class kind of girl, I'm sure you've experienced your fair share of fitness instructors — some good, and some not so good. And then there's this group . . .

The Flirt

This person thinks everyone wants to date him or her; they're all touchy-feely, winking left and right, and giving away their phone number like class is happy hour. And they never get the hint that you're not interested.

The High and Mighty

We get it. You're great at what you do, and people love you for it. Please get off your pedestal and come down to sweat with the rest of us.

The Insane Hard-Ass

This teacher is so crazy-intense, you wonder if you walked into an actual boot camp by accident. Your body shakes, your sweat is pooling on the floor, and she makes you do an extra set. And don't you dare reach for your reusable bottle — water is for wusses!

The Singer

Oooh, I love this song, who sings it?! Beyoncé, you say? Let's keep it that way.

The Screamer

This teacher believes that motivation is measured by decibels in their voice — the louder they scream, the more reps you'll do. But we really don't need you to do that the entire 60-minute class, thanks.

The Oversharer

There's a fine line between connecting with your students and sharing information you'd only share with your doctor, your mom, or your BFF. Sorry, but no, I don't want to hear about your bathroom issues or any other issues for that matter.

The Show-Off

Inspiration is one thing, but when we're struggling to get through 20 squats and you're like, "Look how many I can do while holding this 20-pound medicine ball above my head," we secretly wish that ball would fall on your head.

The All-Up-in-Your-Space

Helpful adjustments are always appreciated, but it's totally creepy when you walk by and lay a lingering hand on me every two minutes. Also — that's my boob, not my shoulder.

The Dork

It's bad enough that he's embarrassing himself up there with those awful moves, but what's even worse is he wants you to follow along.

The Stinker

Stinky breath, stinky cologne, stinky I-know-you-haven't-done-laundry-in-weeks gym clothes — it all stinks.

The Doesn't-Practice-What-They-Preach

We don't expect you to do 100 push-ups without a break, but you probably shouldn't let everyone see you down a Snickers bar and Coke before class.

The Late Bloomer

We all struggle to get to class on time, but we don't expect the teacher to be later than us.

The Walking Cold

No cold or flu keeps you from class, but we wish it would. Really.