Me too. (But quoting other off-topic messages makes yours off-topic too.)
Anyway, hey just because when someone is a heavy Avatar fan doesn't mean they are automatically a SpongeBob hater. I mean I love Avatar to pieces, but I still like this show and you don't see me bashing it. Remember, don't judge a book by its cover.
Not liking season 4-6 episodes though, is a different story... but some people don't like a lot of them and they aren't even Avatar fans.
Now then, again my answer to the percentage of what I think are bad episodes are that 25% to me are bad while 75% of them are good.
To me, bad episodes=To Love a Patty, Good Neighbors, TBoBB, FAU, Waiting, Atlantis SquarePantis, and Blackened Sponge.
Good episodes=Graveyard Shift, Krusty Love, Valentine's Day, Pizza Delivery, My Pretty Seahorse, The Camping Episode, and Club SpongeBob.