I just think the dragons are really not that challenging

Maybe run away from them then.

Turn up the difficulty, or if you are on PC there is a mod that makes them even harder also

Doesn't make them harder imo, just makes them longer and even more tedious. they don't change tactics when you turn up the difficulty, they don't get smarter, their behavior doesn't change etc etc. they just get more HP, the amount of dmg you can do is dropped, done and done ;p

Just turn up the difficulty, or try playing in a certain way that will make them more of a challenge and a fight to the death, rather than a chore

They are called Mobile Oblivion Gates?.

But seriously- I can't wait for the CK to come out it would be cool to have mod different dragon types do different things. Like using multiple dragon shouts such as ice form, call storm, call dragon?, Unrelenting Force, Animal Allegiance.

Also make some of them never land.