what I like about http://www.slacky.it :
* 3 column design
* search always visible on top left
* main page has slackware related news + package related news
* "Downloads" menu item displays 'advanced' search + categories w/ # of packages in category
* Selecting a category shows a list of packages w/ description + date added + # downloads
* category list sortable by # downloads (popularity), alphabetical, or date added
* selecting a package shows a more detailed view
* selecting download shows a folder view that is more than a standard apache folder view

what I like about http://www.freebsd.org/ports/index.html :
* search w/ options
* link on left to display categories sorted by alphabet or by logical group
* selecting a category shows short descr, links to more info, maintainer, dependencies, and alternate category
* selecting a package shows bread crumbs, table w/ pseudo directory view
* list of all ports link

what I like about http://www.freshports.org/ :
* "10 most recent commits" in main view
* statistics section on right

what I like about http://www.customize.org/ :
* category view on left
* "recent submissions" in main body at top
* news area in main body