Probably another tip that most of you already know, but here it goes:
I always felt that the Drum Designer was and is a great plugin for drums, especially when I'm a drummer myself so I like how it sounds to realistic. The thing is that as a default, when you pick different presets on the dropdown menu, it only shows you the pieces for that particular kit, for example when you load Bluebird Kit and then you click the kick, it only shows you the kicks for that kit. It also doesn't let you have access to other options, like the bleed from/to other microphones, which is what really makes the sound be so realistic.
So the way that you can access this advanced view is by loading a patch under Drum Kit > Producer Kits. The problem is that sometimes you don't want a whole patch, just the preset and the "problem" with these patches (in some cases will be helpful, of course) is that it creates all the individual tracks and an extra bus, which can be something you don't want. So I copied all the kit presets (not patches) into my preset folder and now I can access the normal presets that are limited by kits, but I can also have access to the presets where i can pick a kick from a totally different drum kit, for example:
If you don't want to find the presets and all that, here's a file with all of them:
Just put the folder inside the zip file on your presets folder:
~/Music/Audio Music Apps/Plug-In Settings/Drum Kit Designer
Hope it's somehow helpful