what’s up要怎麼回？

Here are some responses:

1. Awesome. 很棒啊
2. Pretty good. 很好喔
3. Not too shabby. 還不錯囉
4. Nada. / Not much going on. / A little quiet. 沒什麼啊
5. All good. / Just everyday life. 還行囉
6. Same as always. / Nothing new. 老樣子啊