When buiding a new Drupal installation, I often refer to this list of favorit modules.
CCK
Views
Content Templates
Views Slideshow
Views Fusion
Panels
Image
Wysiwyg
Wysiwyg Bridge
FCKEditor
Tinymce
imce
nodefamily
poorman's Cron
Google Analytics
Advanced Help
XML Sitemap
Jquery Update
Nice Menus
External Links
Simplenews
internationalization
Jquery UI http://drupal.org/project/jquery_ui
Charts http://drupal.org/project/charts
