now you have no restriction of com_content - make nested categories and assign content items to multi categories.
the tags system (both plugin and cloud module) included!
flexi support many content plugins and JComments - one of the best comment system on Joomla.
and with custom fields you can make any type of content (blog, catalog, marketplace).
so its five star for real flexibility!
Especially it useful in component like flexicontent - you just add a custom text field with preffix and parameters and after you just insert path to images in this field.
many thanks for nice free plugin!