I've been a hiker my entire life, and tramped across Europe, Australia, North and Central America, China, Tibet, SE Asia and Taiwan. I love Taiwan best, as it offers more hikes, on more varied terrain, within one compact region, than almost anywhere else in the world. I'm also pretty knowledgeable when it comes to the vegetation, wildlife, biogeographical zones, geology, landscape, and history of the island and that makes all the difference. 

I wrote a well-received hiking guide to Taiwan for Lonely Planet, and covered numerous day and overnight treks in that guide, as well as the ones for Tibet, China, Malaysia and Alaska. 

Here's a blog I kept for several years on my rambles in Taiwan. Below are a couple published articles.

Hiking in the Landslide Capital of the World
Yushan and National Identity in Taiwan