Twenty was hard for me. I felt like the world's perception of you changed. If I did something stupid, people would say, "Eh...you're 19. You ARE stupid." One day later, "Man...you're 20. You should know better."
Thirty was fun. I made a weekend out of it. My family came Friday night. My friends came Saturday night for Texas Hold 'Em with change. My church friends came Sunday to watch the Bears/Packers game. It was a blast.
As to your question: I'm a fan of Tom Ford for Men. It's got some sweet. It's woody. It's spicy. On me, it lasts a good eight hours--strong projection for the first 2-3, then it stays close to me. I like it for formal occasions. I've heard TFFM Extreme is even better, but I haven't tried it yet (a sample should be here Monday or Tuesday).