What Would your ultimate custom game look like ?

My game would have the following traits

High verisimilitude especially in combat  like GURPS or Unisystem

Quick Life path character generation with reasonably simply skills  and a non lifepath option

A solid bestiary with the common monsters

 Two magic systems, 1 like True20's psychic system and the other like Ars Magica

Quite detailed equipment lists

Vehicle , Outdoor and Chase rules

fantasy, modern/urban fantasy and SF support and maybe post apoc support.

So a cross between Melanda, Beyond the Wall  and Unisystem basically