I liked Misaki Number 1! I thought it was charming and a cute twist on the bad / inexperienced teacher taking on troubled teens. Although it closely resembles Gokusen, Great Teacher Onizuka and other great dramas with the same plot, it had way better fashion and sincerity to it. I would not want to see a sequel for this drama because the story line wasn't deep enough to carry it a second season; and toward the 7th episode the storyline was tired.
There are no real plot surprises, there are no real twists and turns. This drama is not going to blow you away or make you cry;however it's fun it's light and its sparkly. If you've seen the other dramas like this you know what's going to happen and you know what the characters will do, but sometimes it's still fun to see the process.
P.s. Karina was really good in this role, but the other actors were plain awful.