On the silver outline on number 10, which is my favorite, I would prefer the gradient to stay in the grays, instead of going to black. The black areas disappear against the black background. I would like to see a slight more focus on the .net.
I think your #31 is fantastic, and looks great in the greyscale version as well. The success and .net are the easiest to read of all the others, which is the most important aspect of the logo.
I would like to see #31 with the outer silver gradient lightened even more. When it is placed on black background the darker areas still make the logo lose its circular shape.
Nice additions, but I still like your #88 the best. If you can make a version of #88 with 'success' bigger it will likely move back to first spot. I like the .NET used in #88 better than all the rest as well.