I personally love that background and would love to have my dining room chair cushions covered in fabric with that pattern. However, as a background for a website? I don't know.
The answer is, it depends.
I think there are a lot of really good choices for website styles, and you just need to figure out which works best for you. I would say go out there looking at other websites for authors and pick a handful that you just love. Figure out what about them you just love and go from there.
Personally, I either want my authors to go BIG with matching to their book's theme, or I want them to not try at all. For example, author Scott Westerfeld (
http://scottwesterfeld.com/blog/ )goes BIG with the steampunk historical war theme that is present in his current book series Leviathan. I love the look and feel of his blog and website. The problem, of course, is if I was only interested in his Uglies series and not his Leviathan series, I might be quite turned off by it as they are two very, very different book series. Author Cassandra Clare does something similar with her book series, but fortunately for her ALL of her books are set in the same world, no matter the series, so the look of her website always fits.
http://cassandraclare.com/cms/home I think it is a good idea to find some element from your book you can incorporate into your design so that potential readers know what they are getting into when they find your site. Easier said than done of course, but a good thing to strive for.