IT depends. I hope my text will be readable =d

I'm enjoying the game itself, ofc I have some favorite cards,like a Knight who gives you a random spell card when you use your Hero ability =d but I still haven't paid a penny to Battle.net mainly because I'm a poor student and all money goes to SG =D

There are many OP cards, but they aren't all legendaries/mythicals, there are many decks/combos you can make with cheap cards.
I'm having fun in HS almost from the release,I had a great collection and I forgot some important shitty info and couldn't recover my account so I had to start again few months ago and I already have almost everything I'd like to have.

I'm not a full-time gamer tho =D

I left Dota2 and CS:GO so I play HS 1-2 hours a day while listening to music, one of that hours is a "tournament hour" - time when I try to get some money. to buy more useless stuff/games to give away

HS is interesting.