Hi... your question it is a little bit too general.
What is your goal?
For example... in some cases I completely disallow the image folder because for some website I do not care at all about indexing images.... In some other cases, images bring me a lot of qualified traffic.
Normaly with wordpress I disallow everything is not necessary from a SEO point of view like for examples: /wp-admin/ /wp-includes/ /wp-content/plugins/ /wp-content/cache/ /wp-content/themes/
If you have on your webspace directories like stats or cgi-bin, disallow them too.I
If you need to delete all urls with question markes (for example) from search engine indexes try to disallow also /*?
I hope my answer was helpfull to you.