The Problem With Twitter: Providing Instant Value to a Glancing Audience

I've been thinking lately,which most times is a bad idea for me, about all the Tweets that constantly scroll across my computer screen at any given time. There are so many messages out there it is pretty much a free for all. If you are pedaling something chances are you don't even look at incoming Tweets because you spend all day fishing for more hits.
What is it in a Tweet that makes you click on the link? Is it the message, user name, avatar, or the number of followers or maybe your background? I doubt anybody takes time to answer these questions because the nature of the tool does not allow time for thinking. Its all about comprehending the speed in which your strength of presence and personal branding need to be conveyed to a viewer that gives him the inkling to click.
The number of followers you have indicates the strength of your presence. It is probably the most important field on the page. The more followers you have the more credibility you are instantly perceived to have in the minds of those who look. Focusing on building your number of followers is always important.
Tweeters are lucky if they get more than a literal second of viewers time for each Tweet posted. We must learn to be successful "Flash Marketers" of our personal brand within the time it takes for the next distraction (tweet) to hit the computer screen. That is a tall order my friends.
How do you manage this, is it strictly repetition and if so when does the repetition become spam? (there I said it) I think as long as we are providing value and we are not constantly bombarding we have a better shot at being successful.
Finally, regularly take an objective look at your Twitter home page and be open to tweaking it every once in awhile. Ask yourself, Would I click on the link? What does the visual instantly convey? How can I provide instant value to a glancing audience? Please share your BKM's.