Hey there! I go as either Dan or my BZP name, Diosjenin.
This is my site, and in it you'll find some fine examples of what someone can do with a few hundred thousand (yes, 100,000+)Lego pieces. I've been collecting Lego for about 14 years of my 17 year life, so most of those 100,000+ pieces are System. But that is not my specialty.
My specialty is making Bionicle MoCs. When the Bionicle line first came out, I knew that it was going to be an enormous hit for Lego - and it was. I have all but a few sets from the line, and I must say that in the Bionicle line are some of the most artistically beautiful pieces that Lego has ever made.
So, my hobby is to jumble together a few Bionicle pieces into something that simply functions as a work of art. The first one (Zero Hour)was horrible, if I do say so myself - but it did have a nice head design. (lol)
Since Zero Hour, I've learned a few things about making creations - their style, structure, etc. are all equally important. Sometimes (Four Horsemen) I forget this.
But for the most part, they have turned out pretty well. So lean back and take a look around.