Previously, we used WCK Taxonomy Creator to easily create custom taxonomies, and then we paired it with Taxonomy Picker to make an awesome custom multi-tag search widget. Our site has tons and tons of fiction reviews and recommendations, and combining these plugins was magic. With zero code knowledge, we were able to set up all the different tags for different fiction themes, subjects, lengths, etc. And then we were able to let readers combine them all for perfect searches.
My problem now is that this is a 3-plugin pack whereas it used to include only what we needed/used. Technically, it's a single plugin, I guess, but it includes the different options of what used to be separate plugins. Since we only use one of those pieces, the other two are loaded into our installation for nothing. I would have preferred the lighter installation of only what we need.