Interesting, but very loaded, question. It depends on the industry segments, location of your business and the reach you want to have, as well as your budget.

I have organized trade shows all over the world and in over 65 industries. So look at industry, location, country/city, attendee profile, demographics, and some other factors. There are over 10,000 trade shows every year in the USA alone. You need to do some "shrinking" of the reach and take it from there.

Let me know if you have specific questions and we can schedule a call. Good luck!