I have only one friend who signed it, my only friend nerdy enough to use GPG.

For most of my usages (SSH, password manager, personal encryption) there is no need of a WOT. For the git commits signature, I have put my public key on Github so there is the "Verified" label aside my commits, but I don't think anybody has used this information yet. And for the email signatures, it is useless without a WOT, it is the reason why I do not bother to sign them anymore.

As someone else said in this thread: «I just like that little bit of extra “yes, this was me” onion layer of security.»