I remembered an article from Yahoo! Sports from a while back that I thought was interesting. Just went and found the article and it was from July 22, 2010, and it listed the 5 worst owners to trade with, and I'm certain that my leagues feature all 5 of them.
Here's a link to the article but I'm going to switch around the explanations a bit to fit football instead of baseball:
http://sports.yahoo.com/blogs/fantasy-roto-arcade/fantasy-rant-five-worst-owners-youre-looking-trade.html
1.
The Junk Peddler - He's the guy who thinks 5 pennies equals a quarter. He thinks offering Robert Woods, Rueben Randle, and Marvin Jones FOR Dez Bryant is a good offer. When you reject, he throws in a 7th rounder to sweeten the deal.
2.
The Essayist - He's the guy who gives you a six page paper as to why you should trade Charles Clay for Chris Ivory, ironing out how the trade makes sense for both teams and that their values are similar.
3.
The Ricciardi - He's the guy who can never get himself to pull the trigger on ANY deal. Doesn't matter how long you've discussed it and how many offers have been made, the trade sits on the table for days and either finally gets rejected or it expires.
4.
The Canceller - He's the guy who offers you a trade, but before you can pull it up, revokes it. He either sends it and then has second doubts immediately, or he purposely sends it and revokes it with hopes that you see it and comment on whether or not you are interested.
5.
The Guy Who Ignores Your Needs - He's the guy who offers you Colin Kaepernick, even though you already have Aaron Rodgers, Matthew Stafford, and Eli Manning, then wonders why in the world you aren't interested in Kaepernick.
Personally, 1 through 4 hit pretty accurately in my league. Just curious as to how common these people are in other leagues, or if my league is a minority.