Maybe we should re-examine the idea of fun, or perhaps the idea of "teacher, what we are doing is not grabbing my attention!"
I'm fairly new to these postings, but, looking around, I see many people 'simply' teaching well. People post games which I find interesting and want to try in my classes, people talk about activities which range from cute to curious and I love it, and in this series of posts Slurgi talks about 'prefix' itself containing a 'prefix' (and my mind echos "itself contains a prefix which contains a prefix which contains ...)
I'm thinking of teaching a class using some ice (which can turn to water and then to steam or back to ice etc) Is ice interesting? Well yes, it is cold and wet, and it goes well in drinks and is useful in summer and so on. It doesn't dress up in a clown suit or talk in a funny voice. When it falls from the sky, silently, as snow kids love it. They love it so much that they will turn their faces to the sky and open their mouths to catch the ice on their tongues.
They are kids and they find the world interesting. (wonderful, miraculous, cool, fantastic, OK, and so on)
I find that interesting.
If I want to make ice more interesting then I will put water in a small balloon and freeze it in the freezer (where else? oh, that's right, outside in the normal weather). If I want to make it more more interesting then I will make many balloons full of water to put in the freezer. If I want to make it even more interesting then I will ask the students to write their names in pencil on pieces of paper and then put those pieces of paper into the balloons that I will fill with water and put in the freezer, then the students can see their names on the pieces of paper in the nicely shaped blocks of ice that we can examine after freeing the ice from the balloons from the freezers.
And to make it more interesting I could ask the students to fill the balloons with the water and the pieces of paper before we put them in the freezer (or outside).
And: we could add color to the water first; or we could melt the ice after; or we could evaporate the melted ice; or we could refreeze the water in a different shape, or use molds to make different shapes like stars, circles etc; or we could float the ice in water and wonder "why?"; or we could crush the ice, and add flavoring, and add color, and we could eat the colored flavored ice and then we could describe the flavor or the feeling on our tongues or the color of our tongues,
... and so on.
What am I trying to say? Just be yourself. You are not only already very interesting, you are fascinating. You don't have to conform to anybody else's criteria to be fascinating. And any student, who is not brain dead, will be fascinated by you. Even if you are totally depressed and catatonic, the students will still be fascinated. And since you are not catatonic, you are already massively more interesting. You just have to show some of yourself.
I hope this makes sense.