I've just checked out your site and there are some very good landscapes on there. I'm jealous of your waterfalls as it's a bit dry here in the desert!
I think the Yosemite photo in your post looks better as a colour shot though.
As some of your landscapes have a very subtle HDR feel about them, you may like to look up this guy:
His name is Simon Parsons and he posts regularly in the Fredmiranda.com landscape forum (username is parsons) - I wouldn't mind learning some of his pp techniques, and he may be worth looking up for some inspiration...