It's moderately easy to spot a MT driver: look for that little back-roll before the car accelerates or the brake light isn't on during a stop light (on a flat surface). And then there's the little delay in sound between shifts, especially when the driver doesn't feel like shifting like The Fast and The Furious.
I sometimes get self conscious whenever there's a sporty car next to me because I feel like he/she is going to judge me for driving an automatic. So what I would do is leave my car in neutral during stoplights and then manual shift with delays in between shifts so it can sound and look like I'm driving a manual.
I wish I had a manual
sometimes. 