I have 2 bikes i tend to alternate between.
Nukeproof mega 275(650b), this my general do everything bike its very stable and is very much the enduro bike that rides like a DH bikes on descents but is light enough to pedal back up if your not to bothered about how fast you climb. It was bought as complete but at this point everything short of the frame shock and forks has been replaced with my preferred parts.
The other is my Commencal Meta 4x where the Mega is stable reliable and forgiving this is the complete opposite. I'll often liken it to a 1980s supercar with far to much power with terrible tyres in the rain, its an exciting ride but you really need to always be on your A game as it will get you into alot of trouble very quickly. Being a 26inch 4x bike it excels on being efficent when sprinting and hitting jumps and with its short travel(130/100mm) it makes an excellant hooligans trail bike for an experienced rider. It is the right kind of stupid so ill often take it for a spin if im riding with less experienced friends so i can alot of fun no matter the trail grade.