I feel like most of my followers followed me because of an accurate or witty comment I posted. Should I actually make the effort to post witty and interesting polls more often?
There is little correlation between poll style and who follows you.
Like a marriage your get in because of sex and stay in for the cooking.
Do whatever you want
I agree you get followers based on comments. They can be insightful, funny etc. doesn't really matter. So if you want more followers, post more comments.