I don't think of the "success" you speak of when I make my stories. I mean that in the truest way possible. I suggest you don't get trapped in the numbers pit.
this is my most "successful" comic:

It made me miserable to write and draw. I hate it and when I do "claim" it in conversations, such as this one, I do so with utterly disgust. I did this one because I knew people liked it. Because I was chasing numbers. Sure, one might call it a success, but it is nothing but a failure to me.
Here are the numbers for my current comic:

Ya wonna know which I am more proud of? Which I feel is more of an accomplishment to tell and produce? What one makes me more happy?
To really hammer it home;

I feel so much more success from finishing chapters for these flops then I ever did for that god forsaken first example.
My feeling of success and happiness comes from creating what it is I want. Seeing myself improve. But I've always been like that, I've full on deleted a pretty popular blog in the past (popular enough to get gifted fanart and fanfiction, archive accounts, ect ect.) because if I am not creating for me, what's the point?