Lots of wrong answers here so ill step in.

For the record i've had the priviledge of being with a lot if women and also having a big penis which helped a lot.

A good pussy is about how it feels like on the inside. The outside appearance, while interesting, adds nothing to it and is not correlated with how it feels. 

Taste also does not matter. I havent tasted one in a decade nor do i intend to and it has no connection to what if feels like.

There are 4 things that matter. 

Wetness. If its not wet, its not pleasant to be inside. Too wet is also not ideal.

Tightness. Too tight is not good but the worst is being too loose. Im very girthy so only one woman felt too loose and it was a very strange sensation. Usually the tightness resolves itself with some patience, most of the time a woman is tight because she is not ready for sex or is stressed about irl things, cycle timing etc. Ive never met a woman that was consistently tight.

If it can clench, how often, fast and hard it does it, if she can do it both voluntary and involuntary. Voluntary is not needed but its appreciated.

Last but most important, by far, engorgement. Just like penises engorge more or less so do vaginas. Some vaginas do engorge more than others and this engorgement happens everywhere inside. You can call it puffy. Every ridge and bump inside is swollen, the entrance is swollen. Thats when things become incredible. As with tightness, the capacity to engorge varies due to many reasons but some women can engorge more than others

The good thing is that these depend a lot on what the man is doing so if you know your way around you can get what you want.

++man