I agree with DarkShadow--the framing/composition seems just a little bit off, with you too low, and too far left within the total picture area.
Selfies are often very challenging. Very difficult. Especially without a real-time viewfinder/LCD readout to guide your expression and posing.
I cropped it so the backdrop doesn't show the window/wall transition. It's still not quite ideal in terms of body position/pose though...and I would clone out the clothing makers' brand icon on the shirt pocket. Here's my take on a possible crop for it:
Of course, you could go with the broader original frame, something like this:
...which has a different feel to it. Normally a
gutter, which is that empty strip running alllll the way down to the lower left hand corner of the frame, is not considered a good idea on a formal portrait, and this has a sort of formal portrait basis to it, due to the lighting (a Rembrandt type lighting setup + studio-like lighting) and the dark background and the somber expression, but in this case, the
gutter works I think to pull the eye up, to your face and eyes.
One issue is that your watermark has become an element of the picture...
I would personally burn down the skin on your neck by about .67 EV or so.