My first Splinterlands pack purchase

Ok... I have COVID, so I'm in isolation and that gives me more time to play... (Always look at the upside :P)

So - I've bought my first deck. First off - Thanks to @drunksamurai for the advice to use the potions... Unfortunately no gold or legendary cards though... Here's the big reveal...

A Rare card with my last one! :)

So this is my full deck... Can anyone tell me, of these, which is your favourite card you play the most? Which do you never play?

Also - Can someone please explain to me... Is there a difference between playing a card that I own from these and the starter card equivalent that I could play without owning them?? As always - thanks for the support and assistance guys.