What animals make the best/worst pets?

Creepy crawlies seem to appeal to some. Perhaps you’ve walked in the park and seen the pet-owner embraced by a rather large snake.
I cringed just writing this description. I guess that answers the “worst pets” part of the query. At least in part.
Rats, I read just this past week, are very affectionate. Not buying it. They fit my definition of creepies.
Now, what -or who- is the ideal pet? With whom do I want to share my home?
Wet noses and button eyes are very seductive, as is that head tilted quizzically sidewise.
Little dogs can be adorable but they are also frequently yappy. My favorite would be a pup who grew to 30 or 40 lbs.
I like a longish waggable tail, as well. It’s how your pet will tell his tale of happiness.
Let’s face it, we offer them so much of our affection, we want them to welcome us. A wag says “hi, so nice to see you.”