My first time at The National as well. Sounds like I'm the only one, but I was just a tiny bit disappointed. Tons of tables, great to see a huge turnout but, personally, I wish there had been a touch more diversity. Loved all the big-4 cards, espically the number of rarities. I was hoping for some of the harder to find items from other sports.
Plenty of examples from 2015-2018 but only saw one Pele, two Ali RCs(saw both sell for good $) and nearly zip from others- soccer, boxing, tennis, racing, golf (a few 81 Donruss), etc. You pay for a table, you can put out whatever you like, but with 600+ tables, I thought there might be a little more variety.
That said, I'll probably be there next year in Chicago.