Minotaur Deck

First, I'll second eliterawr's suggestion that you need to pick up Blood Crypts to help with the color fixing.

Second, I recognize that minotaurs are an expensive tribe to run, but I'd suggest trying to lower the curve.  Specifically, Deathbellow Raider gives you a decent added two-drop.  If anything, it would be better than Minotaur Skullcleaver if for no other reason than because of the one added toughness.

Third, I would lower the count of Fanatic to 2x, and in exchange up the count of Rageblood Shaman to 4x.  The lord effect of Rageblood is far more important and will end up benefiting you more often. 

Fourth, maybe it's just me, but I've found that Door of Destinies can be amazing for tribal decks (even in standard constructed play).  Sure it costs four to play, but if you top-deck your two-drops, then you're already dropping something much more powerful.  Give it a whirl, maybe it makes it, maybe it doesnt.  It's worth a shot.

Fifth, Dreadbore is a cheaper option than getting a 4th Hero's Downfall but gives you more answers to opposing threats (including PWs).  You could easily swap them in for Doom Blade as the BR cost isn't going to be hard to manage.

Sixth, you want at least 3, if not 4, Rakdos's Return in your SB to deal with controlling decks.  Simply put, you're going to hit a wall against anything control-oriented.  The ability to zap the opponent for 3-4, redirect to kill their walker, AND cause them to drop their hand is HUGE and often will just end the game.

I would also look at having some number of the following cards either main or in the SB: Madcap Skills, Chandra, Pyromaster, Drown in Sorrow (gotta love that three toughness for most of your minotaurs), Bile Blight (for opposing Pack Rats), and Whip of Erebos.  These will give you more ways around the opponent, more options for one-sided board wipes, answers to major threats, AND lifelink in the event you're trying to race your opponent.

I hope some of this helps.  Good luck.