If you think about it,
"Which character do you wish would have more screen time?" is pretty much the same as
"Who is your favorite character?"
Let's just face it, who wouldn't want his/her favorite character to have more screen time?
Feel free to express your favourite character's appreciation in existing threads such as:
Vote for you favorite Captain!
Who's your favorite Vice Captain (fukutaicho)?
Vote for your favourite female Bleach character!!
Who is your favorite Vizard ?
Vote for your favorite Espada!
Funniest Female Character?
Also, if you're not sure if a thread already exist or not, you can always use the
"Search" function (just under the number of pages, at the top right)