1) Tells me via a % of what type of things they post (text only vs links, vs images, etc)
2) Tweets to followers % (If someone has 10k tweets and only 100 followers, that usually means they aren't worth following IMO)
3) allows me to filter by media type on the twitter website. So, let's just say I only want to view tweets that don't have media links.
I would pay about 5 dollars for that.
This could also be done as a seperate website layout:
I think it'd be great to rank twitter users based on criteria: How influential are they? What category best fits them in one word? And statistics: What % of tweets have text, links, images? Filtering by media type.
I'd also see this as a very useful tool to pay for. If nothing else by ad revenue on the website itself.
Edit: Actually I think http://www.twitonomy.com/ or http://bottlenose.com/ are pretty nice.