Just returned from 5 nights in Taipei. My wife and I have been to Hong Kong (2 x), Thailand (6 x), Singapore, Vietnam, Cambodia, Shanghai and Japan (3 x) so wanted to explore a new place. Absolutely agree...the people in Taipei are the friendliest in all of Asia. On our first walk to the subway a guy came over to us and said, "Welcome to Taipei." Truly lovely people.

Additional activities to consider:
We loved the Songsham Cultural and Creative Park - Old cigarette factory converted into artist workshops/stores. Really interesting stuff and fun to walk around.
Addiction Aquatic Development - Great food options...we loved the sushi! And the ability to grab food and go from the marketplace area.

We did go to Din Tai Fung and can say it is absolutely 100% better than the Din Tai Fung(s) here in LA. I've been to at least three of them in SoCal (and one in Singapore) and the one in Taipei is just better. Lighter comes to mind. And the menu has much more than the normal menus we see here in LA.

We did go up the Taipei 101. Normally that's not our thing, but it was a perfectly clear day and the views were fantastic. I also found the exposed tuned mass damper fascinating and worth the effort.

We went to two night markets (Raohe and Shilin). They were both packed with people. Shilin was a bit easier to navigate because it's bigger. But I liked the food at Raohe more.

If you want a unique (not cheap) dinner, Mume is a great experience.

Honestly, we had the best time just exploring different neighborhoods, shopping and eating.