G force is one of those funny things really, the more you do it the easier it gets as your body builds up a tolerance for it. When I first began training I hated stalling with a passion, and although I am still not a fan of it, I can now put up with it a lot easier. An added benefit for me is that I used to passionatley dislike roller coasters, now having a stalled a lot I find even the most dreadful ones are quite a nice thrill, and don't petrify me as they used to.
As far as being a commercial pilot is concerned, look at it this way, if you are flying passengers about for a living then I can guarentee that they wont thank you for loading them with G force positive or otherwise. There may be a slight G loading during a turn, but that's it as far as passengers are concerned.
To sum up, don't worry about it, don't let it put you off flying and welcome it, as in its extremes, it can be a good sign that something is going wrong.
By the way, welcome to the flying community.