Why do I need "synching"?

I've used the BB Curves (8300 & 8310) and BB Bold (9780) and now the Galaxy S4. I'm intrigued by the Classic. However, I've experienced some issues with synching on the S4. So, with emails, I would prefer them to be pushed to me. Optionally, I can keep them on my phone or delete them on phone and/or my account. With contacts, I would like to add a contact and it is there only on the phone. Periodically, I'll do a backup to my hard drive. I'm not quite sold on the concept of synching. Can I achieve this simple approach to contacts and email with the Classic? Thanks in advance.