Having lived a couple months in Taipei, my only complain really is the bloody ICE scooters. It boggles my mind that they didn't solve this problem yet. The air quality is absolutely horrendous, and you'll have trouble sleeping anywhere near a main road. It is even more shocking when we realise how convenient and efficient their electric counterparts are, Gogoro in particular is doing an amazing job [1]. It made me realise that we're doing something wrong in Europe by not including them as part of the solution for climate-friendly transportation.
The main thing I keep on raving about in Taiwan is the lack of urban sprawl: it's very difficult to find suburb-style detached homes even in the countryside, single-family homes exist but they are usually packed together in hamlets. It means that shops are always close because the settlements are dense enough for them to be viable businesses...