Parenthetical Expressions?

Question

did i put my comma were they should be in these sentences?
1. The Green Bay Packers are a better football team, in my opinion, than the Minnesota Vikings.
Correct
Not Coorect

2. Brett Favre, the quarterback for the Greenbay Packers seems like a genuinely nice guy.
Correct
Not Correct

3. Some of the other players in the NFL, however, appear to take their jobs for granted and act very arrogantly.
Correct
Not Correct

4. Instead people who do what they love for a living should not take it for granted.
Correct
Not Correct

thank you to everyone who helped ^^

Answer 1

should be

1. In my opinion, the Green Bay Packers are a better football team than the Minnesota Vikings. (In my opinion should be first.)

2. Brett Favre, the quarterback for the GB Packers, seems like a genuinely nice guy.

3. correct

4. Instead, people who do what they love for a living, should not take it for granted.

Answer 2

1. correct(ak41: in my opinion does not have to be first she has correct grammar)
2.Brett Favre, the quarterback for the Greenbay Packers, seems like a genuinely nice guy.
3. Correct
4. Instead, people who do what they love for a living should not take it for granted.

Answer 3

1) correct
2)not correct
you need to add a comma after the word "packers" as well.
3)correct
4)not correct
comma after "instead"

Answer 4

1. correct
2. not correct--needs another comma after "Packers"
3. correct
4. not correct, needs comma after "Instead." You could change the first word to make it read "Therefore,people..."