Singleness of purpose is one of the chief essentials for success in life no matter what may be one's aim.
Success demands singleness of purpose.
If you start to disrespect the character you're playing or play it too much for laughs that can work for a sketch it will sell some gags but it's all technique. It's like watching a juggler - you can be impressed by it but it's not going to touch you in any way.