Feel free to state why, but it's not mandatory.
My favorite enneagram types are 2's, 4's, 5's, and 8's, but 8's only from a distance. I don't like close interaction with them.
I dislike the most 7w6's, and (some) 9w8's. 6w5's I don't dislike per se, but I tend to run into trouble with them. 3w2's and 1w9's are sometimes pretty shitty too.