Working on subdomain instead of top domain

[TheAdminMarket]

Hello,

Is (are) any disadvantage(s) to have my site working in a subdomain instead of the top domain?

My domain is teriakis.com which is my surname but I wanted to have in the url my full name. So I created a subdomain: www.christos and then I placed a htaccess redirection to this subdomain. So my full url now is: http://www.christos.teriakis.com something that I like.

But as a site is not only what we like, but what must be the correct, can you help me by listing any possible problems that I'll face in the future? eg Does search engines counts less the subdomains? etc etc.

Thank you