My advice: stay open but don't force it.

Something I noticed on this sub is that many people treat reading like a work. They will push themselves to read more, faster, broader, they will post review and complete excel sheets. And that's fine, but at the end of the day reading is a pleasure, not a chore. It's totally fine and healthy to want to broaden your horizon but you have a favorite genre for a reason: it's your favorite. Embrace your tastes.

But at the same time, stay open. If you come across a book in another genre that has been warmly reviewed and you're in a lull, give it a shot. You might find something new you like. Just don't force it.