Only kubb. Kubb everyday. I haven't burned out on kubb, and don't know if I ever will. Pretty much all of my friends and family play kubb, and it's their go-to yard game so I don't often have a choice, either! I was a big fan of horseshoes but haven't played in awhile. Yes, I've played bags and teste-toss but they don't have my attention. The fact that a kubb game could last 2 minutes or 2 hours is both a blessing and a curse.
Since kubb doesn't get my heart rate up, and I have a bum ankle, I cross train with biking on and off road and compete in valleycat bike races (urban scavenger hunt) to keep fit and agile. I get up at 4:30am to play kubb or bike most mornings. Some mornings I'll come home to my 8yo son playing a round of kubb in his undies at 6:30am against himself... how can I resist!
Another cross training excercise that I think helps my strength and accuracy in kubb is juggling. I'd actually like to start passing pins with a partner at 8m. Imagine, a juggler passing pins to another juggler at 8m has to be accurate enough to hit a hand. That's 60 perfect 8m kubb strikes a minute for an average juggling pair. Kubboom!