This one really comes down to personal preference. The Definitive Edition received mixed reviews from critics and a lot of negative backlash from the GTA community due to mods of the original version doing a better job enhancing the game. If I had to choose which version of the game I would play and mod, it would be the original as it has a more extensive selection of mods available. The graphics mods improve the visuals more than the Definitive Edition did.