For personal purposes, it would depend on how many cards I had. If it is enough to sort them by sets, or perhaps by color/pokedex number. I don't have a lot of Pokemon cards anymore like I used to, so I can just put them all onto one page.
On the site it is not laid out well and other non-numbered CCG have the same problem. That I can't really comment on, especially if you are the type to arrange your cards based on how the site lists them.
TCDB Collection Leaderboard spots:
#1 Alexei Zhamnov #1 Shane Doan #1 Phoenix Coyotes #1 Arizona Coyotes