I have a domestic shorthair (cat language for short furred kitty mutt) who I am pretty sure has Siamese or other Asian kitty blood in her.
These can be pros OR cons depending on YOUR personality. For instance, I love having a velcro cat. Some people might HATE it. Some people might love a noisy, talkatative kitty, others not!
Siamese tend to be super friendly and in your face (and glued to your side most of the time). They're also very loud. They tell you EVERYTHING. They talk even more if you talk back. Mine has always been very sweet and tolerant (we can smush and love on her, and she doesn't care), but that likely varies between individuals. Mine also fetches, and comes when called (kissy noises or finger snapping makes her come running, and she yammers excitedly the entire way over).
Sometimes she can get a little cloying, like if I am trying to get work done. But having a cat who acts like a dog is awesome most of the time!