Sam Kay was returning from a festival in Bristol when the car he was travelling in hit a Mercedes on the Shrivenham bypass in Oxfordshire.
Mr Kay and his three fellow passengers were declared dead at the scene.
A statement from his parents, Stuart and Debra, and sister, Nicola, said the "countless tributes" to Mr Kay had shown he had "touched so many lives".
It added: "His infectious smile and urge to give a hug is what made him so memorable."
Thames Valley Police has formally identified one of the other victims as Brogan Warren. It is understood the other passengers were Nicoletta Tocco and Krop Jones.
The group were travelling home from vegan festival VegFest when the crash happened.
The three occupants of the Mercedes, including a three-year-old boy, were treated in hospital for injuries not believed to be life-threatening.
The family of a man who died in a head-on crash have paid tribute to a "happy, loving" son and brother.