I used to throw nearly everything. My favorite for many years was a very large screwdriver. Not only could I stick it nearly every time, but it would go far into the hay bale.
Now my favorite is a PJ Tomes Throwing Bowie with a Kenny Rowe sheath. It is large / long, heavy, wickedly sharp / pointed and throws extremely well. If it weren't for the cost, I'd have a couple more made and take it hog hunting. I think it would do its job if I did mine.
Just FYI: My next favorite throwing knives weren't actually throwing knives. They were some Gerber Guardian I's that I practiced with like crazy throwing into hay bales and with which I actually got pretty decent. I never had much luck with the short lightweight "throwing" knives. I have a decent size Branton thrower that I want to try out one of these days.