Being a Jack-of-all trades is not a bad thing. As someone noted on this thread, we all have worn different hats for different companies.
If you are able to do a lot of different things then set up your site with those different things.
You can group certain tasks for specific niches. I work as a VA, VBA and a REVA. But, I also have a team that works with me as well as other VA's that I can call if I get backed up.
You will want to do some strategic planning when you are setting up your site. I have writers and speakers who call me for VA services and then real estate agents who call for REVA services. But, I set up my site so that it is easy for them to click on those specific needs.
Everyone will have different opinions about what you should do and how you should do it. I say take each opinion and focus on the one that best reflects your needs.
That is what we are all here for. A little input and a little feedback
Andrea