I currently have a truck keychain that has about a 1" ball bearing wrapped in paracord that I got at the gun store, a local kid is making them to fund his jr. shooter program. On that I have my truck key, key fob, house key, a SOG keychain knife and a NiteIze Doohickey.
On My Monster keychain, I just have the Monster key and the Ducati rubber keychain they gave me when I picked it up.
On my 899 keychain, I only have a #2 NiteIze S-Biner because everything else but a normal split-ring, rubs the paint on the tank, and, um, no. I'd leave it as a normal split-ring, but I like ability to clip it to my belt/pack. Don't know why this is important...the Monster ring doesn't have that luxury.
My work keychain has a NiteIze Key Rack in black, on it are just keys for work, I have keys to two different offices, so the colors help.