For me I like breeds that have a bit of coat. But not too much coat that require continual clipping. I live in the hills and I wouldn't want to worry about dogs freezing in winter. I also like dogs with tails. I also at the moment do not like bull breeds. I also do not like dogs that continually bark non stop.

Just my personal preferences. Feel free to disagree.

But awhile ago I didn't like jack russells, from the few I have seen I thought they were all yappy, and snappy. But have met a few very smart ones, so would consider this breed.