I think you have to honestly assess what "Success" means to you.
I feel like I'm successful in being a singer/songwriter/musician because I make a pretty good living out of it without having to compromise my beliefs unduly. I rarely play bars as the hours and pay are ridiculous (and drunks are pretty depressing), so instead I concentrate on restaurants, festivals, private parties and institutional gigs (retirement villages, nursing homes, prisons, hospitals, etc...Great $$$ & VERY appreciative audiences, BTW!)
I frequently get told by my friends (in rock & country bands) that they'd rather do a day job & play 5 hour bar gigs for $25 a man 2x a week, but maybe get "noticed", than play for 45-60 minutes in a nursing home for $50 3-5x weekly, and only be seen by the staff and residents. So, I guess they're trying for their definition of success.
Me, I enjoy mine. I'm usually home in time to fix dinner for the family (and only rarely not home in time to tuck my rug-rats into bed), and being a good daddy/hubby is pretty important to me.
What's fame got to offer over that?