Poll: Your Most Important PC Component

While collecting components for DragStyles' PC upgrade, I was thinking about what different people might think is the most important part of their PCs.

Some people are pure gamers, and thus will probably answer 'Video Card' or 'CPU', while others need to handle a bunch of CDs or DVDs all the time, thus would say 'DVD-Drive'.
Then again, others might need their specific Keyboard and/or Mouse to feel comfortable.

I, for one, need Harddrive space. I kinda eat every Gigabyte in mere moments.
Right now, I'm at about 3.5 TB, but I'd easily fill it with games and 1080p Anime.
Thus, the first thing I'd upgrade would be the HDD capacity.

But what is your most important part?
Vote on here, share your thoughts in the comment box

Your Most important PC component
	CPU
	Mainboard
	RAM
	Video Card
	Harddrive
	Other (Please Comment!)