The really nice thing that I personally like about Hyde is the fact that it is very component based. For example, it uses Jinja2 for templating. Which is extremely similar to Django templates. It really is a nice little setup that let's me do some neat things very easily. Very powerful.

Another thing I like is that Hyde will regen only the files needed to be regenerated. You can of course force a full regeneration of the site, but as your site grows (particularly blogs) the slower regeneration gets. This means that for simple things like adding a new post to the site can mean very quick regeneration.

Jekyll is certainly an inspiration, but it seems to be lagging behind in basic functionality of some other more interesting projects.