When choosing slots for bonus openings, it's important to look beyond just the popularity of the slot. Consider the slot's volatility, RTP (return to player), and bonus features. Volatile slots may offer bigger wins but less frequently, while slots with a high RTP may provide better chances for returns over time. Additionally, slots with bonus features that align with your playing style, such as free spins, multipliers, or unique mechanics, can enhance your gaming experience and potentially lead to more profitable sessions.