Somebody said earlier already different bijuu might have different effects on the host. Naruto's healing abilities are definitely a plus, so it's not all bad for him, although otherwise Kyuubi could be a poor servant. Part of the problem of course is that nobody wants to give Naruto hints how to use the power safely. Everybody just keep telling him how dangerous it is (for those around him as well) and how it's not real power and he should rather use only his own body's energy. Naruto being the kind of idiot he is, it's not all too likely he will anytime soon develop on his own with everybody around him like that.

He should travel to some mountaintop monastery (that's not yet ransacked by Akatsuki) to gain mental control so that he could remain sane even with a couple of tails out.