It’s just that some time it doesn’t look good, if a theme is using a font size of
let’s say 10px and I change it to 20px. That’s because it was designed for small type and then all elements (headings, sidebar text, etc) need to be changed accordingly.
JotillaGMG, I use Taxonomy Picker for an advanced search. I spent a lot of time looking for a plugin, and that was the best at the time. You can find it here: http://wordpress.org/extend/plugins/taxonomy-picker/ Depending on what exactly you want to do, you might need a Custom Content Types plugin, to add taxonomies.