I'm a "senior citizen". So I suppose it makes sense I'd own watches. (I don't own a smart phone.) I have one nice wristwatch. I also have two pocket watches. One runs on a battery. The other is a wind-up that belonged to my father & to his father before him. It's not a valuable pocket watch. But I still like it. I'm particularly fond of pocket watches in general. (My wife also has two wrist watches of her own.) If I wanted to collect something, pocket watches are likely what I'd collect. I used to wear mine all the time. However, nowadays, I rarely go anywhere. So I seldom have need of them. So, anyway, from my perspective, I'd have to say, yes, a watch would be a nice 30th birthday present for yourself.