Wordpress for blogs

I am thinking about changing my education technology blog, (www.educationtechnologyblog.com) from Weebly to Wordpress. I feel strangely lured by the deluge of great Wordpress themes I see on my various social bookmark sites. (e.g. http://www.tricksdaddy.com/2009/11/16-free-wordpress-themes-that-wi...)

I know we shouldn't judge a book by its cover, but I think the themes are much nicer at Wordpress and there is a much greater variety of layouts. I would likely find something much more to what I want.

So, here is my question. Is hosting a Wordpress blog more hassle than it is worth? Should I stick with something like Weebly because it has free hosting, or is it worth making the jump? Any Wordpress wizards out there that want to chip in?

Thanks.