Hi and welcome to TM m8
It sounds like you're pretty much in the same boat as myself - buy/learn a new trick, play with it a while and then put it down and move on to another one, never really perfecting each one. Although I gotta say, just recently I've learnt a few new routines, was quite impressed with the method behind the trick, and this, I think, prompted me to spend more time than usual praticing the trick. The end result - I now got a few tricks I can safely say I feel quite comfortable handling - the two that immediately spring to mind being "Dreamweaver by Enchantment" and "Criss Angel's coin to soda can".
If I was you, I'd concentrate on a few tricks you like, or feel comfortable with, and focus your efforts on these - don't end up a "Jack of all trades, master of none"
