I don't like to use tabs in PS.
So I'm working on a picture...for example. I go to filters and come down and open up a plugin. The plugin interface usually opens up in front of the image that I'm working on. After I apply the plugin, the interface goes away leaving the image with the new plugin effects applied. For most of my plugins, this is how it goes but for a few, the interface opens up behind the image that I'm working on - very strange. Here's a screencap -
http://deancapture.com/screenshot.jpg
So in order to use the plugin, I have to move it to another window because the picture in front of the plugin gets in the way.