Hey Cheese,
Not to plug for the site or anything, but...
Donators can delete comics. That's why I did it, because some of my comics felt like naked baby pictures, they sucked so bad.
I think Kaddar brings up some good points. A good no text panel has a lot of comic value. You can almost hear the eyelids flicker. Subtly is good and funny at times, but...punchlines and bookends like "yeah" or "?" or "OK" are hit and miss and require a good set up to make them work. When most comics end that way, usually the punch line is the middle panel and the last panel is just something the stripper had left over and just want to fill it with something. Also, comics, as with people, seem to be funnier when the characters are firmly commited to something. Complacent people make for complacent comics. Kaddar's examples of variations on a theme were good versions of this. He raised the stakes of the characters and punched up the jokey part. That's not to say you have to spell everything out, just raise the stakes.
These are by no means die hard rules, but they're things I've noticed about the comics that make me laugh.
Enough serious talk. Tallywacker. Ah, that's better.
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Peeing sitting down is the gift you give yourself.