I choose every couple. Plankaren is by default the best couple. Kruff and Squidia happened for an episode. Mindtrik would be hilarious, and Spandy is reasonable for SpongeBob's sake. I dunno I guess I just want Bikini Bottom to be a happy place.
Kruff is old and odd, Mindrick is weird, Spandy is biologically impossible, Squidvia is a one-off designed ship and Plaren is a custom built ship made by the writers. To me, none of them are 'cute' or 'sweet' and definitely not funny (my mind can not grab the supposedly-existent humour behind gay Squids). Although sometimes, I do ship characters in one of my fan fics (for the joy of readers) I just don't see it's appeal unless it really is designed by the writers.