Nico Nico Nii!~
Now, before you take the title literally, if you have more than one favorite card, go ahead and list them all! Just don't be posting 20 of them at a time. I know it's hard to choose even just 5, but 20 might be a bit much. :P
So, what are your favorite cards of all time? It can be your favorite for any reason, so long as that reason is PG-13!
For nostalgia value, my personal favorite of all time would have to be the holo Wigglytuff from Jungle.
Appearance-wise, I'd have to say both Meloetta EX cards and both full-art Mew EX cards. They're just so ridiculously shiny and brightly colored! Also, the Pokemon on them are positively adorable!