Look at your pictures Sharpy.. The perfect pen is looking at you? 
All been said about the glues, if you find the titebond thick then you have answered your own questions with regards to glue. Try all the ones mentioned and you will find the one that you get on with best.
Your first pens are a great success and well turned. The shape you will perfect to like yourself and not anyone on here so make them how you feel and do your own thing, if you get a customer then that will speak volumes and give you the rubber stamp that you are doing things right. 
Well done..