Getting tired of things is normal I'd say, it's more surprising to find hobbies and interests that you don't get tired of. I was into playing guitar and listening to guitar-centric music for years, but eventually my "guitar snob" approach to picking music made me unable to find new interesting artists quickly enough to replace the ones I was getting tired of. You could say that my music collection collapsed under the weight of it's own snobbery. 
It could have just been a certain point in my life, but I also think that the rise of the internet raised my standard of entertainment. I'm pretty sure I would return to playing guitar if a time machine sent me back to the 1990s, but nowadays most of my interests are related to computers.
It could have just been a certain point in my life, but I also think that the rise of the internet raised my standard of entertainment. I'm pretty sure I would return to playing guitar if a time machine sent me back to the 1990s, but nowadays most of my interests are related to computers.