Scouting
I'm playing a druid for the first time ever in my current campaign. And I can heartily recommend it.
While I am the only divine spellcaster in the party so my role is a little skewed I've really enjoyed playing him as the preeminent scout. And I see the potential for playing a druid a number of different ways.
The key, as I see it, is animal companions. For the scout idea you might pick up a wolf, for the scent feat mostly, but then I recommend spending the rest of your animal companion slots on bats.
They fly, have phenomenal spot, listen, and move silently checks, and have blindsight out to forever. With the right spells you can train them pretty easily.
Then you move through the woods with the greatest of ease, get your wolf to pick up trails, use your bats to scout ahead, and then send the rest of the party in with a good idea of what's going on.
This is the powergamer perspective, but, spun another way, the Ranger is the huntsmen the Druid is the master of the Hunt.