your observations are plenty and encourage at least a few responses.
It´s true that the use of a keeper might contribute a little to the stiffness of a tie by holding both blades together, but I don´t think the keeper is the reason for the "kipper" look. The knot and the collar are accomplices in this crime. It´s been many years since I purged my tie collection from those last ones which -despite all efforts- tied up in a way that made me look like I had a dead fish hanging from my neck. Also, in my experience I have realized that even my not so great neckties, when tied in a four-in-hand and placed rather horizontally on the band of a cutaway or widespread collar of the right neck size, spring up and come alive.
I don't mind my tie going a bit out of place or twisting either. Sometimes I even do it on purpose forgoing the keeper (for example, with some knitted ties I wear with sack style tweed jackets).
So, I don´t use other devices for keeping my ties in place (not counting the stitched labels of a few). Not tabs, not paper clips, not pins. Certainly not safety pins, which show disdain for the health of your ties (although they must surely be 18 karat gold).
Maybe someday, when I start to lose my mind, I will use one of these http://www.tiealign.com/tiealign-how-it-works.html

My necktie "mode" changes with my mood, although not widely. There is a limit to what you can express with your tie (not considering, of course, those in which you must use the keeper for turning on the music chip at Christmas celebrations)
