I just recently got Krika, and have also read a few comics and quotes from him.
Though I don't know everything about him or obsess about him, I do find Krika to be one of the more interesting of the Makuta.
He seems like the only Makuta that can tell between good and evil, as opposed to only seeing the ones with power, and the ones who are weak. Of course I haven't done my full research on him, that's just what I noticed from what I know.
Overall I think he is a pretty cool Makuta, definitely one of the more interesting ones. And the set is pretty nice.