My great passion in life is photography. So when I look at websites I see the finished holistic composition. This composition is invariable the combination of several distinct website design style features - images, layout, typography, illustration, etc.
I believe that for website work the same principles apply as with photography: balance, rhythm, proportion, dominance and unity. My favourite photographer is Michael Kenna, his works illustrate these principles very well. The question is if you are able to apply these principles, to use separate website design style features to create a holistic website or not. For sure - always remember the importance of usability, because the result of your work, the website, should be a practical tool which fulfills its function.
Knowledge of composition alone is not enough to create fresh and unique website design style. Every artist has his own inimitable 'hand', his style. The website style created will depend on the objectives of the website, it's target market, the products or services supplied by it's owner or the type of information it needs to convey.
Below are some examples of website design styles (just pay attention - designers love mix styles):
Collage - a collection of images that combine to something totally new.
Ornament - abstract and attention grabbing.
Glass effect - "glass" buttons, reflections and "plastic" panels; "web2" - style (it seems it's everywhere).
Typography - typeface selection, size, layout, combinations of typeface and colour.
Futurism - excellent for the right type of information or services, 'all about future'.
Minimalism - gives the visitor space to 'breath', fresh, uncluttered.
Retro and Vintage -reproduce old-fashioned motifs, trends and objects that had been an essential part of the past.
I hope it helps you create successful web sites and page designs in less time, with less effort and with more impact. Or cheers you up.