I don't think I started with just one and if I did I am not sure I could remember exactly which one!
My guess would be I started with parsley but quickly added cilantro, basil, rosemary, thyme and oregano. Over the years I have also grown dill, sage, lemon basil and others that escape me right now.
The first basil plant I grew went wild! I was able to divide and give away basil plants to other people - it kept going for quite awhile. I have not had a plant like that since.