Thank you!! That was perfect, the exact answer I was looking for!!!! Oh well, so Is it possible for me to be a regular Vamp on the dawnguard side at least?
Should be the same issue, they will turn you away. I never tested it but I heard people upset at the fact that they initiated the dawnguard questlines as a vampire, and then after siding with the dawnguard and turning down Harkon, they were not accepted by the dawnguard anymore randomly.
The normal vampires are apparently just thin blooded Volkihar vampires. It's the excuse as to why all the vampires look the same.