Me? I love dungeons, and long games. I want magic on my first run-through, where I do few side-quests in full. But it should relate to the plot heavily. It needn't all be dungeon--after a while in a dungeon, the feeling of it does grow old, whereas outside it you can keep adding new terrain and elements, because it's everything. So, give me eight dungeons or so, and a lot of in-between. I love a long game. But for later runs to be more in-depth, make a lot of side-quests, not in the least of them collection quests. Goddess, i hate the. Trade sequences, yes, gathering 50 rabbits or 24 bugs or however-many of whatever? No. Not all of it should be collection.
In other words, I like really long, really good games... Not a common combination, unfortunately.