So I started off this game playing a Fire Strike build, and it just ended up with me right clicking the majority of the time and it’s pretty boring. Any suggestions for fun builds?
I personally enjoy a Witch Hunter DW poison build myself. however check this thread http://www.grimdawn.com/forums/showthread.php?t=36808 there are a lot of good and diverse build for you to look at and decide what you personally might find the most exciting. 
By fun what do you expect?