Really, very good this post, especially for Messrs. Limpers of life.
I'm particularly not a limp fan, it's a very amateur move.
Almost always I am raising (even with letters of type 45s in bad position as UTG) or fold. Limp does not please me at all.
One is because you're halfway through your game (or you have a monster hand and you're setting the trigger, or you do not have much and you're crazy to see the flop). Another is because it is also not possible to get a reading about the villain in that particular move, in the case of more limps ahead or even the BB check.
In short, I think limp is not worth it, in fact it is very rare sometimes that it is worth going limp, very rare indeed.