If you watch the top players serve, one thing you'll notice is that the vast majority of them serve various types of forehand pendulum serves mostly from the backhand side. There's a reason for this - it puts them in a better position for the next shot, especially if they want to favor the forehand if they get a weak return. It also allows them to get used to a limited number of returns - if they serve from the forehand side, they have to get used to returns that come at them differently. But players do this so mind-numbingly often that receivers are used to this type of serving. (Some top players do use tomahawk or even backhand serves from the forehand side, but these are relatively rare.)
A few years ago Baltimore Orioles star shortstop J.J. Hardy visited the Maryland Table Tennis Center. He was probably the best table tennis player in non-table tennis professional sports, at least in the U.S. - about 1850-1900 level. He had strong shots from both wings, but had one very unorthodox thing - his best serve was a forehand pendulum serve from the forehand side. Against MDTTC players, over and over they struggled with this serve since they had literally never seen it coming at them from this angle before! The ultimate test was when J.J. played against a 2400 player - and he struggled with the serve as well. As he put it, "I've never seen anyone serve that serve from the forehand side."
There are a number of advantages of serving from the forehand side. Here's a listing. (For this, I'm assuming both players are righties or both lefties.)
So why not take a couple steps over and experiment with these serves? And if they work for you, then that's one more tool in your tactical toolbox.