I think anyone can create inspring posters to decorate your own home/office. All you need is a good photo that you took (very important - don't use a photo you didn't take, or ask a friend if he/she took it for permission) and some Studio Calico brushes.
Brushes are way cool because you can use them any size and any color on your photos.
Here I used two different Studio Calico Brushes sets for MyHouseRE.com and used this image : HELLO HELLO SCRAPBOOK KIT DIGITAL STAMPS & the HELLO HELLO ADD ON DIGITAL STAMPS BY IN A CREATIVE BUBBLE.
Simply resize your picture A4 size or 8,5x11 on Photoshop, pick your favorite brush and have fun!