Handle is extremely vital for me, but then if I like a specific shape then I have to forgo handle from manufacturer as I can adjust it to my liking by tinkering around. Semi-oval, with bottom being thick is my preference.
In terms of shape I look for something which has no concaving, middle to low swell. In addition, I'm also not big have of big bows, slight bow (or no bow) is what I prefer more than having big bow like Asian bats.
Pick-up and balance is very important as well. I look for good pickup but not something too light (an example would be Icon). From scale of 1-5, I look for pickup to be around 3/4.