time versus opening

time is a big part of the game, but I'm talking about how much time you should invest in studying certain openings.  how often you see them in a game, one, (and also which ones you and your opponent have control over producing), which one can hook a beginner/intermediate, two, how complicated the variations may be to draw even or take the edge ( for instance the king's gambit can be devastating but to learn it takes the place of many other openings you could learn.  Also I'll say that to get a opening underway versus needing to know it's varation is the main factor to decide how much time you should put in.

The Sicilian is fairly easy to get underway, so is the Queen pawn openings, but it can get tricky with the Evan's gambit, the King's Gambit and so on. 

So if you think e4 e5 is happening a lot, maybe invest in the king's gambit, or if it looks as though he may be a beginner, invest in some nice knight attacks in your opening, go search for those and put your time there.

Me, I am at this point right now.  Playing chess for 5 years and now wanting to add a couple more openings to my arsenal.

Openings constitute about 10% of my study time.