I'm using Seamless Studio and upload from Illustrator using shapes I created myself but I've used some default brushes and symbols too.
What I most like is to make templates for ColourLovers to enjoy and it makes me very happy when they are coloured over and over again. I try to thank everybody by loving their work, but sometimes it gets difficult or I miss a work or other so sorry for that!
In my Photoshop and Illustrator presets I have brushes (freebies) that I have downloaded from the following sites: Brusheezy (brusheezy.com), Inky Deals (inkydeals.com), Dezinerfolio (dezinerfolio.com), Deviantart (deviantart.com), so I might use those in the future. (everything I download is free to use even commercially, you should always check that!)
You can find lots of help for your creations in several groups within ColourLovers but this group really helped/helps me: Patterns_By_Type