Wow - you're one person who I envy their avatar...and you're complimenting mine! Thank you VERY much! That means a lot and makes me smile. 
I love goofing around with Sully's photos....and I have ADD.....
But I still haven't figured out layer masking. I know that's insane (and embarassing) b/c "once you get it, it's easy and the possibilities are endless." I just need to look it up and play around with it for a while.
I love LOVE your avatar of Chloe and Tinkerbell - it is cute and catchy and really well done!!!