What's Your Go-To Currency Pair for the London Session and Why?

For those of you who trade the London session regularly — what's your primary pair? I've been going back and forth between GBP/USD and EUR/USD for the past year. GBP/USD gives bigger moves but can be spiky and unpredictable. EUR/USD is cleaner technically but sometimes underwhelming during quiet weeks. I've heard some traders swear by EUR/GBP for London because it captures the tension between two European economies directly. Others prefer GBP/JPY for the volatility. Does your pair preference change depending on the macro environment (e.g., risk-on vs risk-off), or do you stick with one pair regardless? What made you choose your current main pair for London, and has it paid off?