Patience, way too much free time... 
In all seriousness, I believe activity is very important, as well as stability. You should be able to feel confident the Vice President won't magically disappear.
Ability to be fair and as unbiased as possible in Senate decisions is also a major factor, of course.
Why can you not be the Presidential candidate!?!?
*sobs* It's not fair!
I cannot be the Presidential candidate because I do not own a suit. Or any of my own clothes, actually. I live in a box behind a Starbuck's.
Thank you for your question!
But that means that you understand the common man!
