It is suggested in the game that practicing mind reading makes you better at it. But every reading costs XP. It would seem to me that unless there is a hidden mechanism that counts how many reads you have done, then to be better at mind reading, you are better off not mind reading people so you level fast, and use the skill you get on the mind reading skill...
Also, so far I met one guy whom I can mind read to get "new insights" (which gives me 1 point, I put it into intelligence.) Are there are such hidden bonuses for mind reading?