The answer that always puts me in quite the minority: The Enterprise-A bridge as it appeared in TFF. To me, that is the perfect balance of the clean functionality seen in TOS/TMP and the elegance and warmth seen in TNG. Not too much of either.
Then we are a minority of two. Check out my reply on page one.
Make that three.
For a long time, the TUC bridge was my favorite, but the fact that the ambient lighting is ordinarly low on the bridge has, over time, degraded my appreciation for it. I would probably prefer physical buttons on the TFF bridge, mainly because I think touchscreen controls will never work on a real spaceship (how many accidental keystrokes can a ship stand at the helm before it tears itself apart?!?!), but the 5 bridge is a place I'd not mind being a bit.
Rob+