Boyd admitted he was bored of playing the same teams so often in Scotland's top flight.
"That's the target so it cannot be boring. I cannot say that."
Fortune admits Scottish football was not what he expected when he arrived from Nancy, despite having had a loan spell at West Brom.
He said: "Personally, I know I have to score more goals than I did last year. I will work on it and try to do better than last year.
"First of all I will try to do more for me because I try to progress every year. Last year was a difficult year; this year is the year of Celtic.
"I learned a lot because I didn't know anything about Scottish football when I arrived. It's more difficult than everyone expects when they arrive.
"You have to fight every game and it's not easy. I'm ready to fight. Now I know it's a difficult league and I'm ready for it.
"I know the teams that I play against now. When I arrived, I didn't know teams like Falkirk but now I know the teams. I'm more confident and I'm ready now."