For fresh, I like a lot vetivers. They smell fresh, slightly green, natural, and last quite well. Several good examples,both in niche and in mainstream. Favorites include Malle Vetiver extraordinaire (the freshest and zingiest) and Chanel Sycomore (more elegant, with a touch of wood). Both would be appropriate both for casual and for more formal environment, especially the Chanel. In mainstream, a good vetiver would be Tom Ford Grey Vetiver.
For florals, I like a lot Metal by Paco Rabanne (fresh green floral), but it has sadly been discontinued.