There's nothing wrong with saying hello to someone everyday
When I was in university, I spent a month doing a placement... so I had to take the bus. I'm from a small town, and even though I hatteeee feeling like I stand out, I'm from a place where it's normal to smile and say hello to everyone.
The bus driver, like many other big city bus drivers, wasn't all that friendly and just did his job. Throughout the month, he eventually started to say hello back to me, and it got to the point where I'd get on the bus and he actually BEAT me to smiling and saying hello!
Although it made me feel embarassed that he recognized me.... at least I know it was from something positive.
He might not show it, but maybe he would appreciate the hello. Or not! No way to know