Keep in mind that the fruit/vegetable you get a seed from, may not (is likely not) be a good indication of the quality of the fruit/vegetable that would grow from the seed you choose.
The fruit/vegetable’s quality is determined by the seed that turned into the plant that GREW that fruit/vegetable. The seed you’ve pulled out to plant yourself was created by a combination of the “mother” plant, and an additional polinator. The additional polinator may/may not be a member of the same exact variety, or the original parent plants were not yet stable varieties yet.
You can get some very interesting things, and that’s often how we get new things like hot peppers, and tomatoes variety.
I’m personally planning to plant quite a few of my current hot pepper crops seeds, just to see if I get some really freaky seeds! I’m currently growing about 30 plants, of 6 different types.
I’ve certainly had plenty of tomato plants pop up in my garden, coming from the previous years fruit droppage. The resultant fruit was good, but I’m not sure it was entirely “on variety”, though, I tend to grow mostly the same type of tomato (or closely related varietials).