In no particular order:

1. First time driving on the left

Coromandel Peninsula, New Zealand

2. First time eating sushi (the real kind, with raw fish)

Kyoto, Japan

3. First time riding in a tuk-tuk

Chiang Mai, Thailand

4. First time using crampons

Fox Glacier, New Zealand

5. First time drinking sake

Kyoto, Japan

6. First time riding a motorbike

Phuket, Thailand

7. First time eating kangaroo and camel

Yulara, Australia

8. First time sailing

Whitsundays, Australia

9. First time snorkeling

Kailua Kona, Hawaii

10. First time feeding an elephant

Elephant Nature Park, Thailand