I don't think that my 'platonian' beliefs are on-topic here on Less Wrong,

Really? Understanding and clarifying the concepts and categories we use to organize our beliefs seems pretty damn on topic compared cryonics, personal identity and creating a billion dollars out of nothing.

Not to mention I'm pretty sure nominalism is wrong/bad so I'd really like to know if all the smart people here disagree with me. And if indeed we find overlapping views here we might find that a particular 'metaphysical' view (terrible term) is more conducive to thinking rationally, which would be interesting.