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.
Love is the answer to everything. It's the only reason to do anything. If you don't write stories you love you'll never make it. If you don't write stories that other people love you'll never make it.
