I certainly use bounce most of the time. Or a tilted head and diffuser. Ideally - it's BOTH.
But bounce will only be optimal if you have a relatively low white ceiling or are bouncing off a white wall. Just remember - the light bounced off any surface will transmit the color of that surface to your subject.
Also, trying to use bounce when the ceiling or wall is too far away to be useful, doesn't do much for you. Just remember - the light from your flash has to travel all the way to the surface you're bouncing off of, then all the way back to the subject.
And, oh yeah- the surface also absorbs some of that light too.
That's why I'm never without the diffuser.
If the color effect is minimal you can usually adjust for it in PS (assuming you know how to do it correctly). And I would certainly choose to do this and get the advantages of bounced light rather than use direct flash or no flash.
So yeah, bounce is usually good. But be aware of the potential problems it may cause.