I am content with single legged kickstands.

On my LHT I have a conventional stand mounted on the chainstays near the bottom bracket, several layers of electrical tape on the stand to protect the frame paint.

On my other bike I use the Greenfield rear stay mounted stand. I prefer the rear mounting, but the rear stand appears to be more sensitive to sloped ground. if I park my bike so that it can roll forward or if the front wheel can roll to the right, it will roll and fold up the stand.

When I was a kid, I had a steel two legged kickstand on a utility bike that I used for a newspaper delivery route. I regularly put a lot of weight on that bike and the legs spread and split the stand apart. I have not read about anyone having this problem with the stands that you can buy today, but I would be concerned about splitting the stand apart on some of the designs I have seen.

Also, if you are using both front and rear panniers (substantial weight front and rear) and a center stand, I am sure that you are putting a lot of stress on the frame when you put the bike on any stand that is designed to hold one wheel up in the air. For this reason, I choose to stay with a single legged stand, as frames are not designed for that type of stress.