This is LITERALLY my biggest custom: it's a modified Boba Fett Halloween costume I made for my son. He wears it to conventions as "Zeo Bloodmoon". Every costume contest he's entered he's placed in the top three, if not winning. He is insanely popular as a photo-op whenever we attend a con. I know this isn't a cosplay site, but I couldn't resist...especially as his character is the son of one of my figure customs (Zedge Bloodmoon, seen earlier in this thread). These pics are from when we first debuted the costume a couple of years ago. It's since been modified w/ more greeblies, accessories and light effects.
Bucket off, game face
He's holding a thermal detonator!
Kill tallies, helmet sigils
Helmet sigils, other side
Chest plate says "Family, Honor, Freedom" in Maximal script (alphabet from "Transformers: Beast Wars)