I couldn't find any threads about it, so here's one.
For the one of us that do a lot of PP in Photoshop, here's a thread to show off your custom brushes.
For the ones of you that don't know how to make your own brushes, here's how.
Start with a new white document (file/new) choose the size and OK. Then you can draw anything you like with Black. When done, go to (Edit/Define Brush Preset) and click OK. Now you have your new brush at the end of your brush pallet and ready to use.
you can pretty much use any image you like and make it a brush, as long that the background is pure white and have your design in black. You can also have shades of grays in there, those will be transparent depending on how dark or light they are.
Here's a few basic ones I made and use for catch lights.
This one is to use with a layer mask with the catch light
to get this effect
PS: you can have these brushes by right click/copy image then open a new document in Photoshop and paste it.