The Mint Chocolate chip tastes quite good. It has the appropriate amount of creamy-minty-chocolate goodness. Having less milk-fat in the base doesn't seem to have hurt the flavor (although it may have contributed to the less-than-ideal texture). Of course, with the peppermint flavor, it doesn't need to be as creamy.
The texture isn't quite perfect, though. The big problem was that it didn't get to sit in the mixer long enough (even though I was going to let it sit longer). The chocolate chips I dropped in after about 20 minutes of sitting in the mixer were large enough that they were interfering with the dasher (and causing some splashing of the contents of the bowl onto the countertop). It might also have had something to do with the large number of chocolate chips I put in the mix. So, I had to cut short the amount of time there. It still tastes good, but it's pretty dense and the ice crystals are a little too large.
I think the next batch, I'll do a plain chocolate (or something else without chunks). That way I can run the mixer for a much longer time and see how things turn out.