Go for the goal next time. I've had a few times in my life I was in the same kind of spot, I played it safe and usually missed out. One thing about regret, forget it. Dwelling on it, or rehashing it more than a couple times does you no good. I call it failing forward (It's basically what I've done with steem), fail at something then learn from it and go again. In my book the only way to truly fail is to quit.
I enjoyed the post, I'm going to have to look into heartstone I've played a few different similar games, but the were usually with actual cards. Are you into the steemmonster game they have on here? I've heard they are going to be having a tourney in October I think.