Is it normal to use a separate password for every site?

Yeh but I would forget them all. I use many of the same ones all the time and I still forget them.

I usually stick with the same one, might have to add a couple of digits to it on certain sites but other than that it's usually the same.

I have a tiered system too based on importance but not a unique one for each and every site because then I forget them LOL

I have one uncrackable password.

yes, you should use separate passwords, but beware of the scam sites, and some other sites which do cheap things, like they crack your password and then proceed to your email account and then do all the cheap actions they want to do.

I do the same thing, and I have a list of all my passwords so I don't forget. I usually pick a random word lol

I have a tiered system where i have have different passwords for different types of things

Yes its normal and smart. I do that.

Yes, it's normal. Most people do it for privacy and/or security purposes. Personally, I don't find it necessary but, hey it's your call.

I have a template password then I just add different symbols/numbers to the end.

I use the same 4-5 passwords interchangeably depending on the importance whatever it is

You're not the only person I know who does this. It's actually more or less what one is supposed to do.