I don't personally like clowns, and Pietro does scare me a little because of that. If he was simply a rainbow sheep and not a clown sheep I think I'd be more open to having him in my town.
When he moved in my town, my initial reaction was, "meh."
I like his design, though personally his personality does not quite seem to suit his design. In other words, I would like him a lot more if he was a cranky villager.
He's alright. I had him before, I think he was one of my starters but I really didn't like him at the time. Looking back, I guess he was kind of adorable, but eh. xD I just am not a fan of any of the sheep.
I adore Pietro and will never lose him again. He's cute, sweet, and even tho, like most everybody else I don't care for clowns, he somehow won me over at once. Plus, I love his house. I find it fun and cheery.
He's a bit... Un-natural. The fact that he has a Smug voice makes him kinda freaky. I had him and he totally ruined the character of my town. He's ok if you have like a bright and colorful town or princess theme, but he is rather loud if you catch my drift.