This is a question with no real answer!
It all depends on your own personal style, how well you pull it off, and what precise look you're going for. I do a softer, more painted style with my comics, because that's what I feel comfortable with, and it achieves what I want it to achieve.
That doesn't mean it's inherently better or worse than celshading. There are celshaded comics that look flat and terrible - but there are loads of celshaded comics that look downright amazing. It's all a matter of how you use the methods you've decided to go with.
Basically, if the question "Does it look good?" can be answered with "yes", then it doesn't matter which style it's coloured in.