While I understand the desire to keep a professional portfolio, showcasing only your truly top works, that's not really the purpose of Xepher.net. The intention here is to let people share their creative output, especially when they'd be unable to do so without such a free service. For art sites without a central focus (e.g. a comic) that generally means having a large-ish quantity of works available for perusal. Since visitors will ostensibly be coming to see the art, not a thrice weekly comic or something, there needs to be a fairly large amount of that available. That's why I don't usually accept small/focused/professional style portfolio sites... though in fairness, many artists here have a comic, or a large gallery, or a photography project, etc... AND keep a separate portfolio as a section of their site The main focus of a site always has to be sharing free, creative content though, and professional promotion has to take a back seat to that. Don't get me wrong, I love your art, but XN isn't a portfolio host... You're already on carbonmade, which, while I understand it's limited in what you can do, IS specifically meant for small-ish, professional portfolios.
Bottom line is that, if you're wanting to share your work with the world, and need a free host to help with that, XN is the place. On the other hand, if you're just wanting to show some select examples in order to get hired, I'm afraid you'll have to look elsewhere. I do wish you the best of luck though, and I'm sure you'll go far no matter where you end up.