Going through this with my life time riding buddies.
We've always ridden dirt together. Trails and motocross. I haven't gotten tired of it, but they have given up on being sore and not willing to take the risks.
So they have all sold their dirt bikes and bought street bikes. I thought it was going to be boring, as my street bike is pretty much a cheap, fast way of getting around with the odd tour thrown in. We had a big group ride together last summer, first time with all of us on street bikes and I had way more fun than expected... Bunch of goons on the street!
Did a big re-model of the FZ6 last summer and I can't wait to show it off a bit this year.
Near the end of summer, motocross starts to feel repetitive, but that's because I put so much time and effort in to it during the season, that it starts to feel like an obligation and forget how much fun I'm having. If I miss a weekend then I'm ready to go again.
Depends on who you are, why you ride and the experiences you're going to have.