Welcome, I'm sure you meant to say I am groom by I'll forgive the travesty, all kidding aside welcome to the 17th shard, beware of spoilers and don't take cookies from anyone who gives you.
You forgot the one of the biggest ones in Mistborn "There's always another secret" Kielsar. Highlighting the fact that he is in Mistborn Secret History's.
Definitely Cultivation for the fact that Cultivation is powerful and able to hold her own against Oduim on Roshar.And also, I would be driven towards cultivating my power as much as possible. Or maybe I'll take stab in the dark and be a Shard who I have no idea what it's Intent is and see what happens.
So maybe the Shard could really be something along the lines of Serenity or Isolation being that after time the Shards Intent will eventually being almost in control as in Ruin being a nice person and then being totally evil.
So I was reading some old post's by Brandon Sanderson and he mentioned the possibility of FLT in the third of the Mistborn trilogy's as how the series will be Si-Fi and this got me thinking in the post he said "it has to do with speed bubbles but any questions on that will be RAFO"( Excuse me if it is not precise I could not find the exact quote.) so then I thought what would happen if inside a speed bubble (Cadium or Bendalloy) a coinshot repeatedly pushed would that cause the normal rules of physics to be suspended therefore causing FLT or would a normal reaction take place?
Definitely a Sliverist, because why bother getting lerasium if I could just steal their powers. Although the whispers in my head are just a figment of my imagination right?