I have been using PGP for many years. At first it was just something cool to play with, however I've been building mail servers and computer networks for many years- I know first-hand, exactly how easy it is for ISPs, "hackers", corporations, and governments to read other peoples' email.
And since there is no realistic way to prevent this from happening, it only makes sense to encrypt my emails whenever possible, so that even if they do happen to look at my message (out of the billions of emails which cross the internet every day) they won't be able to read it.
This is the key I now use on a regular basis:
pub rsa4096/0x6B2EDC90B5C6DC30 2017-05-27 [SC] 6353320118E1DEA2F38EAE806B2EDC90B5C6DC30 uid [ultimate] John M. Simpson <firstname.lastname@example.org> uid [ultimate] John M. Simpson <email@example.com> sub rsa4096/0x297E5961AB566594 2017-05-27 [E]
This key is also attached to my Keybase account.
This key has not been revoked, but its original expiration date was 2011-08-03. I have updated it to not expire, but not everybody got the update, and some people consider it expired. In the interest of avoiding confusion, and because I wanted a longer key, I have stopped using this key and now use the one above instead.
pub dsa1024/0x8F8D8C9A9014AD1A 2008-08-03 [SC] 5AA49FD4D245733518C2F3D98F8D8C9A9014AD1A uid [ultimate] John M. Simpson <firstname.lastname@example.org> uid [ultimate] John Simpson <email@example.com> uid [ultimate] John Simpson <firstname.lastname@example.org> uid [ultimate] [jpeg image of size 5148] uid [ultimate] John Simpson <email@example.com> sub elg4096/0xC6655C940F6C5215 2008-08-03 [E]
This was the first key I generated "for real", with the intention of sharing it with the world and using it on a regular basis. I haven't used this one since 1999-2000, and in fact I have forgotten the passphrase for its secret key. Please don't use this key anymore.
pub 1024R/2FB5EDA9 1996-04-06 John Simpson <firstname.lastname@example.org> Key fingerprint = 8F EA B0 95 6C C4 02 F8 11 1D BE 62 48 09 05 52 uid John Simpson <email@example.com> uid John Simpson <firstname.lastname@example.org>
These are old keys which I have decided I will never use again. If you happen to have one of them in your keyring, please add the revocation certificates as well, so that your PGP client won't try to use them by accident.
Revoked 2008-08-04 pub 1024D/3306FCFB 2002-02-27 John Simpson <email@example.com> Key fingerprint = 3E71 7105 6DE0 EFA1 00B5 B12D 101F 5173 3306 FCFB uid [image of size 4420] uid John Simpson <firstname.lastname@example.org> sub 4096g/71CF8D66 2002-02-27
Revoked 2008-08-04 pub 1024D/9EDD51D9 1998-01-05 John Simpson <email@example.com> Key fingerprint = 47EC DE79 2527 83E9 08DB 7E75 708D 7E9E 9EDD 51D9 uid John Simpson <firstname.lastname@example.org> uid Thawte Freemail Member <email@example.com> uid [image of size 4420] uid John Simpson <firstname.lastname@example.org> sub 2048g/8C0A413C 1998-01-05