What would the night sky look like from a planet at the centre of a ring galaxy?
It would perhaps be less impressive than you imagine, and not much different from how any spiral galaxy would look from near the centre.

The many stars near the centre would mean that there were lots of foreground stars and dust near the centre would obscure parts of the ring. The stars of the bulge would mean the whole sky was filled with star fields.  

The ring itself would be distant and so quite dim, it would look like a "milky way", but without a central bulge. So it might look something like the milky way in Auriga. Nice, but not especially dramatic.