curretly I run hand-watered coco\perlite so I have to watch it every day or two. usually 2 days after watering and then the day afterward if it still didn't need watering.
when I got things automated like I intend to do on my next run, or if I don't need to I go in about once every 3-4 days to check how things are going.
And as I water my soil plants every saturday night right now I go on saturday night as well.
There are stage I go in the grow room twice a day - late flowering and the seedling stage. I used to have a chair in the grow room on which I used to sit for around 20 minutes at a time after I was done tending them just to watch them.
But to be honest, where I'm now (slow motherplants and early vegging plants and a week and a half into flowering) doesn't really amaze me that much. Been there, done that. They all look the same to me at this stage.
Oh, and I usually once a month re-build something so thats at least 5 hours straight inside.