Curiosity led me to the Sunday Times Social List after spotting a few #stsl tweets and reading this blog by Adam Tinworth. I don’t consider myself influential, I share the occasional opinion and find other people far more interesting, but put myself on the list anyway for a laugh.
This will be my highest rank ever:

Bet I won't be a 'tycoon' for long
In some ways this is a bit like Word Nerd, the Times game to show how clever you are. It was fun for about half an hour and a great piece of promotion.
At Journalism.co.uk we created a top 100 most influential journalists in the UK, in early May. We seeded the list with 50 people and then threw it out to the crowd. There are journalists missing from this list, but the people on it were nominated by their peers, and then ranked according to PeerIndex‘s algorithms.
Personally I don’t think there is a definitive list. There are people who are useful and interesting to you, and they are the most important.