When choosing a casino for blackjack, look for favorable rules like 3:2 payouts for blackjack, options to double down on any two cards, and fewer decks, as these lower the house edge. Consider the casino's atmosphere and comfort level, ensuring it has reasonable bet limits and isn't too rushed. If you're into card counting, choose a casino that is more accepting of basic strategy or doesn't penalize card counters. Lastly, make sure the casino has a solid reputation for fairness and is regulated by a reputable gaming authority. These factors can improve both your chances and overall experience.