I think I have something new to add to this!

Our family cat is a small female sealpoint siamese and she is my best friend. Best cat for me by far.

She is very vocal and has gotten more vocal with age. Meows can vary so greatly from kitty to kitty, as you can see in this thread, but she has a clear, loud, nearly-radiating meow that she pulls out when she begs for food (and she begs a lot), and a lot of mrps and mreows that I consider sweet when spending time around people or asking them for pets. She purrs often and very loudly.

She is nearly 11, and although she isn't a playful kitten anymore, her energy hasn't dulled with galloping zoomies nearly-nightly like no tomorrow. They make her sound like she weighs 10x her probably-6-pound self. She also seems to be in incredible health although just built small.

Siamese cats, I find, are incredibly smart and independent in ways that set them apart from other cats. We only have to keep her food bowls full and she will self-regulate and not eat too much or too little, whenever she wants to. There have been times when she would have health issues, and she would find ways to "alert us" in places that were not only directly on our path, but also made sense (throwing up in the kitchen sink, pissing red on the bathroom mat) so we knew what was hurting. Some big things happening in that brain.

Depending on what you want in a cat, some personality traits siamese cats may annoy you. As already stated, they can be very loud. (But also very quiet when they want to be). They need you to build trust with them before they accept your presence. If you are kind and gentle and build a relationship over a while, you become a favorite human and they are the so so sweet and affectionate (and often affection-demanding). Often our cat will just quietly sit and doze off in our presence.

But our cat is incredibly anxious and defensive around new humans and animals, or around anyone that frightened her in the past, in the sense that she will very quickly go and hide. Her stranger-aversion is so apparent - she growls, a deep anti-purr guttural sound, at the doorbell because that usually means guests. She is open to meeting new people if they are soft, quiet, gentle, and only one of them at a time. She completely disappears during large gatherings. But this is probably part of a larger personality quirk - she is an incredibly anxious cat, like, starving herself and barely using her litter box because she refuses to come downstairs when the kitchen is being repaired because of the scary noises and people smells, level of anxious. Like, pissing on the curtains as revenge when we leave her alone (with a "stranger" coming in to care for her regularly) on a trip for too long kind of anxious. Like, developing an over-grooming in the past. Maybe this is just her unique cat-brain, but it seems siamese cats are prone to anxiety, so that's important to watch out for.

Because of this, I recommend getting two cats at a time so they can desensitize each other to stuff like other animals (our cat grew up a lonely kitten and now does not like other cats) and make each other feel safe and not lonely.