Draven is a very old man by any measurable metric. His life before the Sith was a normal one for an Anzat, relatively speaking. He was born on the planet Anzat and lived there for several hundred years, working mostly as a vagrant whenever he didn't pick up mercenary work for credits.
Around the time he was four hundred, Draven left his homeworld and ventured into galaxy. He had grown bored and disenfranchised with his life and figured that the could find fulfillment elsewhere. Eventually he found himself on the world of Nar Shaddaa and settled somewhat into the same life he had before, although this time he managed to get his own apartment in a "nicer" area of the Smuggler's Moon. There were a lot more suckers waiting to be hustled in pazaak than there had been back home, and the Hutts paid well enough.
It was a considerable time later that Draven Karkko finally found what he had been searching for his entire life. Whether by fate or fortune, Draven ended up on in the Unknown Regions for a scavenging run on some old ruins. The benefactor was a faceless collector with very deep pockets, and Draven had been on a run of bad luck so it was a job he felt he couldn't pass up.
Shortly after their arrival to a small planet in the Unknown Regions, Draven's scavenging vessel malfunctioned and crashed just outside their intended destination. He was the only surviving crew member, though he suffered several significant injuries. Laying in the wreckage for what seemed like days, eventually Draven was discovered by other scavengers, and they decided to save him after recognizing his force sensitivity - something until now, Draven had not known about himself.
The scavengers were members of the Legions of Lettow, an ancient Sith cult that was widely isolated in the Unknown Regions. Through them, Draven was taught of the force and how to wield it, and has since become considerably strong in the darkside thanks to the formation of the Sith Eternal.
P E R S O N A L I T Y
Even among the sith Draven is considered a cruel person. Normally his personal brand of evil is not the overt, wanton murder of random civilians kind, but that doesn't make it any less insidious.
Draven is an "ends justify the means" type of person. You don't live in a dangerous galaxy for as long as he has practicing altruism or assuming you will receive it from others. If things or people are obstacles preventing you from reaching a destination, it is within your right to remove them.
Outside of his existence as a Sith and the things that it entails, Draven also finds enjoyment in bar games and drinking - as well as seducing both men and women of most races. After living for over six centuries, Draven has come to the determination that an open sexuality is a natural evolution, so he doesn't bother to discriminate much.
The old Anzat also has a penchant for holobooks, mostly horror and biographies.
A B I L I T I E S
Living for such a long time as afforded Draven a wide array of personal skills.
Among the ones he honed before becoming a Sith is his skill at pazaak, darts, billiards - really any game that takes place in a cantina. These cantinas are also where he picked up how to fist fight. Against most Draven can hold his own in a melee brawl, but if a truly trained and practiced individual he would likely be bested.
He's a capable shot with blaster pistols and less so with bigger things like rifles, but much prefers not to use them. Draven is much more comfortable wielding a blade, whether it be a knife, sword or lightsaber. Patience, determination and most importantly control have always been key characteristics of Draven's fighting style - as such, he naturally practices something similar to Form VI now that he has command over the force.