C.J.
I have entered some, passed on others.
It depends how difficult it is for my to actually enter and how great the prize is.
Also, I don't like putting a lot of information out there for folks to "market" things to me at future dates, so that could also be an issue.
The wild card here is how many dedicated blog followers do you have? If you have small following of mainly friends and family, they won't enter thinking they want to allow one of your other readers to win:)
Good luck!