MTG

• Commander with low power brackets, no tutors, no infinite combos, and mostly budget decks.

• Cube Draft.

• Playing precons against the computer using Forge. I copy the names of the precons from a block, then play them against each other using a bit of randomization:

import itertools, random

decks = ["Deck A", "Deck B", "Deck C", ...]
matchups = list(itertools.combinations(decks, 2))
random.shuffle(matchups)

for i, (deck1, deck2) in enumerate(matchups, 1):
    print(f"Match {i}: {deck1} vs {deck2}")

• Aside from the usual Theme Decks, some of the most interesting precons are Duel Decks, Pro Tour Collector Sets, Salvat 2005 and 2011, and Commander decks. You can find a full list of precon decks here.
• Penny Dreadful on MTGO when I want constructed but cheap play.
• I've played a bunch of Draft and Standard on MTG Arena but I didn't really enjoy it that much. It felt like a chore doing the dailies and just caring about getting the four wins per day.