I agree with fairyofsong - I currently work in a chain store and an independent. Everyone, including techs, have far more responsibilities when working in an independent pharmacy. You learn far more at an independent in my opinion. In chain stores.. the roles aren't as blurred.
Another point I'd like to bring up is that if you're looking forward to patient interaction, you'll see far more of it in an independent. From my experience.. there's just no time for that in a chain store 🙁