We have generally enough pianos in enough different colours and styles to suit most peoples whims and fancies.
What about the musical instrument inside!?
We must think about TONE and TOUCH!
The TOUCH must be even across the scale: each note must have a similar resistance and response. A similar amount of pressure will produce a similar amount of sound from all keys.
When it comes to TONE I find it can help to have some pictures in the mind . . . I like to imagine a huge Disney cave with stalagmites and stalactites with drips and drops that make the loveliest clear notes. This is how I like the trebles to sound. If it sounds like bicycle spokes it is a poor piano.
Bass and mid range notes need to sound like an opera singer, not someone holding their nose.
This is the sound profile we like our pianos to adhere to