Great post by Will McInness
here, I'll redo it in full:
These are the archetypes I've noticed using Twitter.
1. Mickey ME-ME-ME!
2. Tina Trivia
3. Freddy Fragmentation
4. Polly Phoney
5. Cedric Spam-again
6. Lucy Local
7. Ozzie Occasional
Mickey ME-ME-ME!
Constantly posts, and has racked up over 12,000 updates in less than 10 days. Old wounds from playground days cause constant need to be talking about and promoting self - more than 80% of tweets are about self successes. Remaining 20% of tweets are self-promotion-by-proxy, bigging up cronies and analgazing towards the few people loftier than selves.
Tina Trivia
Sweet, endearing, and decent person basically having a fiddle with Twitter.
Tweets once a day with something like: 'got foot scrub caught in drawer - took me ages to get it out again. Probably have a beer now'.
Freddy Fragmentation
Is a publisher or micropublisher (blogger, other website / service) boshing out stream of syndicated content from main platform to Twitter because it's another available outlet in this ever-fragmenting media consumption world.
Polly Phoney
Got into it to say they had for professional reasons. Genuinely they feel they understand it and know which box Twitter fits in, but actually don't at all.
Cedric Spam-again
Cunning new age spamming twat that is followed by 9 people and is following 34,873 people, because they've realised that people get a high when they get a mail saying 'Spam Captain is now following you'. Working the numbers. Should have their intimate bits nailed to a fridge door.
Lucy Local
Has a ring of local mates moderately or heavily using Twitter. Is using it overwhelmingly as a social network and actually finds it very useful for keeping in touch and ambient intimacy with people they already care about and/or know.
Olivia Occasional
Potters about with it. Posts infrequently - once one week; 3 times in a day on another day.
Me? I'd hope I was mainly Lucy (oo-er - OK, maybe Louis) Local, but I have been known to send the odd nauseating Mickey Me-Me-Me! tweet too.
You'd have to be a regular twitter user to recognise these, but if you are I wonder which you are 
And of course there's Anne Arbitrage, who is using it as a
free texting platform
I guess we're Freddie Fragmenters as we post on Twitter and Jaiku ( and RSS and email) for different readers.....we used to post on Facebook till they
threw us off for the heinous crime of being a (gasp) Blog....
As to les autres, I find that the ambient intimacy aspect is the most interesting...and on that score I find it amazing that the biggest story on Techmeme today is that the Facebook "is" will
be no more
To be honest, my view of a lot of these things is "get a life - go Blogging

"