Taiwanese dramas usually aren't as high quality or with as big budget as korean or chinese dramas...compared to korean and chinese dramas, taiwanese one's looks a bit outdated. Also, might just be me, but I find the newer taiwanese dramas so uninteresting. I find the older taiwanese dramas more to my taste, my personal favorite is MARS from 2004, if you love romance then I definitely recommend it :) it's a bit heavy an dark (NOT a romcom) but oh so deep and touching, the chemistry between the 2 leads is AMAZING and their love is so beautiful. Lots of passion so there are many real, passionate kisses:) It's a healing drama you could say, about 2 broken people who come to find comfort and love in each other. I don't think you can see it in HD quality anywhere (but I could be wrong), what it lacks in budget it makes up for the intense, deep storyline :) I also love the OST "Ling" by Alan Kuo, so memorable!
There is a popular new taiwanese drama (it just finished) called Before We Get Married, I haven't seen it but a lot of people likes it :)