Looking on the internet deeply has found these results:

I wanna be useful is the most popular phrase on the web.

I wanna be helpful 1126,000 results on the web	I wanna be useful 1143,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I don't mean to press you or anything, it's just that... I'm feeling a little nervous since we have a class in 3 days and... ...I just wanna be helpful. I wanna be a champion ice skater like you. I wanna be a cop, and I wanna go to the academy. But I wanna be back there with you because I wanna be honest about who I am. You wanna be helpful, go get the camera. No. No, I'm just excited, and I wanna be helpful. I wanna be special and I wanna be famous. I wanna be a senior partner, S.P.	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

I wanna be helpful

1126,000 results on the web

I wanna be useful

1143,000 results on the web

More popular!

I don't mean to press you or anything, it's just that... I'm feeling a little nervous since we have a class in 3 days and... ...I just wanna be helpful.
I wanna be a champion ice skater like you.
I wanna be a cop, and I wanna go to the academy.
But I wanna be back there with you because I wanna be honest about who I am.
You wanna be helpful, go get the camera. No.
No, I'm just excited, and I wanna be helpful.
I wanna be special and I wanna be famous.
I wanna be a senior partner, S.P.

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.