He's asking which one you like MORE. Not one or the other.
I trade to play. When it comes down to it, I'll buy the cards I need as singles, or boxes. I don't waste money buying packs anymore. I just save the money I'll use for packs, and put them towards a booster box. I love playing the game, which is why I'm always trading. To get better cards for my deck.
Collecting was never really my thing, and for me, it get's boring to have a lot of cards to just stare at and do nothing with them. But that's just me.