I've been playing a ton with Core Set 2020 since its release on MTG Arena, and this set is a blast for both Sealed and Draft. It's got a fantastic mix of sweet themes, resonant cards, and good gameplay, so I'd definitely recommend going out and trying it for yourself. To that end, I have a Pack 1, Pick 1 article for you, and we are going to go over all the categories of cards you could open in your first pack. Let's dive in!
The Best of the Best
M20 has a lot of cards I'm never going to pass if I open them in pack one. These are the cards you windmill slam and do a jog around the table if you crack them. The Cavaliers are all here, as are the non-Sorin planeswalkers and a pair of extremely angry Hydras. If you are lucky enough to see one of these cards, you should take it and do what you can to end up playing it.
The Best of the Rest
This list is also full of cards you'd be very happy opening. Late-game bombs like Agent of Treachery share the list with efficient cards like Murder (the only common this high on the list), and everything here is something I'd be quite satisfied starting with. These cards don't have the raw power level of the tippity-top cards or are a little more expensive to cast, but they will win you games and are definitely good early picks.
A Good Start
Here is where some of the better commons and solid uncommons live, and I'd feel good about starting with any of these cards. These aren't what you dream about when you open your first pack, but they definitely pull you into a color (or multiple colors) and can give your draft a solid direction. Note that the multicolor cards, while powerful, do commit you to more than one color early, which is a risk.
A Decent Start
Here, things start to get a little dicey. If you end up first-picking a card on this list, you aren't committing to much, as these cards are just above-average playables. I actually kind of like taking colorless cards or Temples from this list, just because of how flexible a start they provide.
I Guess I Have to Pick Something
While all these cards are perfectly playable, they aren't where I'd like to start my draft. This is a mix of solid commons, sideboard cards, and more situational/synergistic options. A card like Bone Splinters can vastly overperform, but you need sacrifice fodder to make that happen, so I don't like taking it early. If you open and take one of these cards first pick, you are starting a little behind, but you can still certainly end up with a great deck.
As I said before, I highly recommend Core Set 2020, and I hope this article can help you on your way toward mastering and enjoying the set.
May all your packs contain a Cavalier!