I never counted, but I think I have much bigger losses than gains. It is not hard to conclude that, but the thing is I never had big expectations of gambling. Sometimes I try out the site I find on forum and sometimes I just play on sites I already tried.
I mostly set a limited budget that I am willing to gamble and then count the losses in the end. I don't gamble with expectations to earn money.
The good thing about not having expectations in gambling even when a game ends as lose you don't have to be worried because you are already anything can happen. It only takes one who understands gambling very well not have any expectations I gambling. Too much expectations in gambling sometimes mislead people in the way they gamble which they can decide with so much amount of money expecting that it will end up as win for them. As a gambler it is a good thing to understand that anything can happen, this will help one and guide one gamble just with the amount they can afford.
Gambling is unpredicted, their is no need to expect so much from it because if the outcome of gambling is not what one is expecting it can cause to get emotional.