I also have a tourer, often heavily loaded and it's used daily for commuting, therefore the stand is kicked up and down at least 8-10 times a day, every day.
I went through 4 stands over the period of a year or so before I bought the Tranz-X kick stand.
It has now been on the bike for about 7 years and still works all day every day.
Despite what others may think, I would class a kick stand as essential as lights, a rack or mudguards. On a road racing bike they are not essential, on a bike that is used for touring, commuting or shopping they are.
In cyclecentric countries such as Germany, Denmark or Holland you would not be able to buy a touring/commuting/shopping bike without a kickstand (and rack/mudgards/bell/lights), for some obscure reason in this country they don't come as standard.
http://www.bikester.co.uk/bicycle-e..._2258_1646_&c=18#kickstand-kick-stand-tranz-x
As an aside when touring in France a few years ago we arrived in a big field camp site with a big international cycle touring meet up. You could spot the English bikes as they were lying on the ground ! Everyone else had stands.