Email and surveys

I’m working through the 14 steps and your entrepreneurial course you added. ( thank you!)
Do you still use aweber? Why do you use it over constant contact? I was talking to my websidte Help Line and they kept pushing constant contact. I know you say avoid mail chimp, right?
My business will need many forms and much data collection from emails. please also give any system advice to put in place to collect survey answers and group people accordingly for follow up emails.
Thanks again