I've had a bit of a twist to the begging for subs. A couple of times I've made a comment on a video and then the creator comments back to me saying "Since you like that video why don't you check out my other videos and sub to my channel." I find that super annoying. I feel like I did something helpful by watching and commenting and the person isn't appreciative, they just want more from me. Even if they had added in a "Thanks for watching my video" it would have been nice.