I like both and have both...Small dogs are the best to cuddle on the couch with or carry around, Kyra is the smallest dog I've ever owned at 8 pounds. I really don't see myself in the future with any smaller dogs, more medium/large/xtra large...I think Jack is the ideal size for me, hes only 45 pounds, 21 inches tall, perfect couch/bed size but is still large enough that I don't trip on him consistantly (well not usually).