I'm new to this, but I started with a basic recipe from Soap Queen, and I don't imagine I'll vary it too much. There are a couple of recipes I feel like I'll use regularly, and maybe add different clays and essential oils and additives (I've been saving and drying my orange peels to make orange peel powder, and I ground up some cardomom and cloves for an orange spice soap.)
I'm not into the swirly artistic soapmaking. I think it's really cool to see what you all come up with, but for me I just want to concentrate on some scents I really like.
I did have a friend ask me if I could make a bear fat soap, so I googled a bear fat soap recipe and tweaked it a little bit and ran it through the calculator and am going to try a batch, so the calculator is a really valuable tool for things like that. It's also good to read up on ingredients, too, because when I first came up with a recipe it was 25% cocoa butter, and then I read that that was a bad idea, so I played around with it to get that percentage down to 10%.
I think it's all about personal preference. If you want to play around and develop your own recipes, then go for it. If you are happy sticking with a tried and true recipe, then go for that!