I never had much as a kid so I didn't start collecting legitimately until the past 3-4 years
Ultimately, you need to factor in more than just whats popular when it comes to deck building, and the best way to figure that out is to build a deck and play some games without thinking too much about it
Go back to the beginning with Pokemon Trading Card Game Classic
Its a bit naff, but its just the way of things
Long story short, Ellie and Alan have a lot of space to do some really fun and cool things, and I cant wait to see what people cook up
Dimensions affect how cards work for games as well as the aesthetics of the cards, because they could be like a little canvas when you get them custom printed, totally depending on the size of the card for the layout of the design