Thank you to AquilaTempestas and Annette Kyubii for reviews! XD!
01. They make loud noises.
02. They're fun to hit.
03. There are many sizes.
04. He wants to make a 'Bell Orchestra'.
05. He likes the shape of them.
06. They're funny.
07. They distract him when they ring.
08. They're good hiding places. (Well, the ones that are big enough for him to fit in.)
09. He likes the sound they create.
10. There's a huge veriety in types. XD!
He also could be warning people. ('Kolokol' means 'bell' in Russian and 'kol' is often used as an onomatopoeia in Russian for the tolling of a bell, a centuries-old designation of approaching danger.) This info came from Russia's page on the Hetalia wiki as one explanation as to why he says 'Kolkolkol' when upset, so it gave me the idea that Tala is obsessed with warning people with bells.
Next is Mariam, Ian, Bryan, Joseph. (Yeah it seems like it's been taken over by V-Force characters and the Demolition Boys.) XD! I've been getting a few about characters and hair related obessions, I'm not sure if I will do one or not because almost every character would have one. So don't expect one too soon, especially since I have many, many prewritten ones to post still. XD!