"exciting to watch" is a perfectly acceptable phrase in written English. You can use it when you are describing something that you find visually stimulating to observe. For example, you might say "The Olympic gymnasts' performances were truly exciting to watch."
"It's exciting to watch them.
That's very exciting to watch".
I'm exciting to watch.
It has been constantly exciting to watch.
And that's exciting to watch.
McAvoy is exciting to watch.
"It's exciting to watch it evolve.
I think he's exciting to watch.
It's genuinely exciting to watch.
I mean, he's very exciting to watch.
It's really exciting to watch Sage expand.
Thanks to Ludwig my first paper got accepted! The editor wrote me that my manuscript was well-written
Listya Utami K.
PhD Student in Biology, Bandung Institute of Technology, Indonesia