I of the Dragon is a straight action RPG, with a linear story line. Enemy AI is rather simple at the start of the game (fly a little above tree level and keep moving and you will rarely get hit), but it does get a little better later, and a few opponent types have fast and/or seeking attacks (that can be dodged or outrun if you are paying attention and boosted your flying speed).

Gameplay is pretty much fly around and shoot things, stopping once in awhile to eat things. A couple times I played for 3 or 4 hours straight, but usually 1 or 2 hours in a day was enough. I'm not a huge action RPG fan, but playing as a dragon is nice, and there are changes in terrain and new opponents in each new area that help keep it from getting too repetitive (and you can always take a break if you are not in the mood for 'hack and slash').

There is a demo (227MB) and walkthrough you can check out, but the game may be hard to find now (other than GameTap, etc).