I have exactly the same dilemma. Generally I find that the del.icio.us 'extended description' allows me just enough room to express my opinions on the link, so I don't feel as though I'm only providing links. I do feel oddly guilty, though, about not posting personal things more often.

True, I do try to use the extended entry in del.icio.us to "sell" the link after someone (can't remember and CBATG) pointed out that there needs to be some context and explanation of why a reader should follow a given del.icio.us link.