IS it cute or stalkerish to leave a note on his car?

Stalker only if you didn't know him.

I used to leave little love notes and poems and flowers or whatever on my ex's car all the time! I think it's very thoughtful to do.

it depends what the note is about but either way if your dating him I doubt it would bother him , now if you didn't know him or weren't dating it might be kind of creppy or weird for him to just find the note .

AS long as the note isn't sappy, you should be okay.

Like it should say something sweet on it,
and the call him a biotch.

Just to keep the balance.

I, personally, would think it was kind of cool that you were into me enough to wanna do that...but for some reason I think most dudes would think you were too obsessive.

Only leave a note if it reads, "I'm in the trunk ;)" Because that wouldn't be weird at all. Or you should leave a quick reminder like, "Don't forget to check your oil" because then you're just being helpful. Good Luck!