Do you carry a custom knife everyday, just for special occasions, or never?

I pretty much carry one everyday now, unless I know I am going to be in a situation that will lead to abusing it.

My EDC is a Bub Worrell Peanut been in my front pocket for the last 6 months and HAIL yes it's a custom ;-)

I carry a folder made by me everyday and everwhere.
Oldgrinder
www.blademan.org

Carry my Mayo TNT everyday. Only exception was when I traveled to Canada. Worried it might cause problems at the airport (in Vancouver not in the US) and didn't trust the airlines to not lose my bags. Packed my sebenza for that trip. Saw a fellow have a hassle with a smaller factory knife at the Vancouver airport and am glad I didn't risk it.

Bob Lum Large Chinese Folder everyday. Have a Darrel Ralph Mini Maxx coming soon, may be my new EDC.

Everyday there is a custom blade with me. During the week it is a left handed folder by Charles Marlowe. On the weekends it is the Geno Denning chute knife that matches my .357mag.
They are only fun for me if I use them.