And if you have ways to sacrifice creatures, Smaug gets even better, since otherwise your opponents can exile the token or bounce it
Sure, it cant exile Scrapheap Scrounger, like Horribly Awry can, but being able to also counter the big threats of the format in Verdurous Gearhulk
The color identity of your commander is set before the game begins and doesn't change during the game, even if your commander is in a hidden zone (like the hand or library) or an effect changes your commander's color
A card from an early print wave can be more desirable than a later reprint if supply was tight
Whether you mulligan slightly more or slightly less, so long as you're consistently falling in the "reasonable" part of the spectrum, you can feel like you're doing pretty well
This makes it really important to remove your lands from the deck before bothering to go off