First off, it all depends on what I want for the presentation. Some heads stand up on the bottom, some don't. Some swim well with the hook always up, some don't. That's just some things to think about.
A good jig head that is tying friendly would be the tear drop for hair. I look at the collar on a jig head to make sure I have enough room for tying and I like the way a tear drop tapers down to the collar. Some heads can be tough to tie if it has a small collar and also look at the type of collar or keeper. Some arkie molds have just a ball on the end. This will give you less flair out of the hair when you tighten down on. Just a thought.