Thromok is a typical Gruul aggro commander with an ability that appeals to my inner Timmy.  I wanted to make a deck that brings out his strengths with token generators and disposable ramp creatures that search out basics and then get sacrificed.  However, I don't want the deck to be totally dependent on its commander.  There are many ways you could take the deck beyond this (Saproling tribal, anyone?), but I've always wanted to play with the green and red planeswalkers, so I wanted to put those guys in.  I also wanted to play with some of green's notorious fatties (Avenger, Craterhoof, etc), and so I put in a birthing pod so I could go up the chain, as well as a bunch of other tutor spells. 

The way I want this deck to work is: ramp into a decent manabase, throw down Thromok when I have some sort of haste enabler out and attempt to swing for 25 or so, then when he inevitably gets killed, sacrifice him to either momentous fall or greater good to draw a bunch of cards, then hit 8 mana and start throwing haymakers like insurrection, warp world, praetor's counsel, craterhoof, etc. 

Where I get into trouble with deckbuilding is trying to account for all kinds of contingencies (What about removal? Gotta put in hexproof/shroud/indestructible.  What about defending against flyers? What about countermagic?  What about board wipes?).  Then I end up throwing a bunch of crap in the deck that makes it less effective at what it does.  You'll see some of that stuff in there, but for example:

Vexing Shusher
Asceticism
Eldrazi Monument
Akroma’s Memorial
Beast Within
Duplicant
Terastodon

These are all cards I felt I had to add to address various threats.

Where I could use help is with someone who has played a lot of commander before, let me know which of the contingencies I should account for, which cards I should add to account for those, and help me free up the rest of the deck.  I could also use help picking maybe one or two directions to go with the deck and focusing on those, instead of trying to do everything at once and doing it poorly.