I have trouble making "top ten" lists of anything.
Whenever I try, one of two things happens. Sometimes, I come up with the first three or four immediately, but then can't think of any others that come even close to being in the same category. Other times, I wind up with a giant list that I can't manage to narrow down. And in both cases, I usually have difficulty assigning rankings to whatever I chose.
It's much easier if it's asinine. For example, I didn't have much trouble settling on my list of top twenty-six favourite letters, ranked alphabetically.