I don like command line utilities. Is there a graphical user interface for Potrace?
Yes, there are now several graphical user interfaces (GUI’s) for Potrace, contributed by various other people. There are GUI’s for Linux and for Mac OSX. I have not tried them myself, so I cannot say if they work or if they have all the features you want. I suggest to try them out. Please look under GUI’s and related software on the main Potrace web site.