Phew, this is a huuuge post that I've been working, on and off, for about two months.
Preview:



[60] Firefly and Serenity icons - mainly River, but also a few text and other characters.
[01-05]





[06-10]





[11-15]





[16-20]





[21-25]





[26-30]





[31-35]





[36-40]





[41-45]





[46-50]





[51-55]





[56-60]





Resources
Feel free to use, credit is wonderful but not required :)
Oh, I also made a Serenity brush (as seen in 03, 04 and 46) - if anyone wants it I can upload it.