There’s a new Angus Reid poll (not one that has been commissioned by PB) in which the following was put to respondents:-
Here are some words that people may use to describe [Gordon Brown, David Cameron, Nick Clegg]. Please choose up to six words that you think describe him.
The online survey had a sample of 2005 and took place on Tuesday and Wednesday. Further details can be found here.
As far as I know voting intention questions were not asked.