Hi,

Remember this rating it is NOT a criticism I am only trying to help.

The main photo I will change it, you are nice on the others.
But coming to the first one, I will take off the cloth and change it for a more smart look instead, like a eve cloth?. You have a great long hair, use it!, do arrange it for something more sexy?. I mean you know as every woman knows that hair play a very strong figure when trying to show yourself sexy, make the most of it!!
I again repeat myself, you hair is great to help you look great, then will take out the glasses and have a nice casual make up, it doesn't matter if you use glasses or not, that's another thing, not the real you with it, show your face clean, with make up and play with your hair, remember the cloth, you would look fantastic and show how nice, clever you are. Remember men like women who care about herself.
That is what I will do, it is NOT an advice, but yes will try to see myself seductive.
Hope this help Maria