Woohoo! First post on this site! (Ignore my prettiness in the post. I like pretty.)
Okay, so I'll honestly say my favorite version is the Dawn of Souls version with the 20th Anniversary version as a close second. Those that complain about the difficulty of Origins and the original or the anniversary look should play DoS because it keeps the Origins sprites while updating the experience system to be fairer in how it goes up. It takes less time to get to level 2 on spells and weapons, nothing goes down if you work on a spell instead of directly attack, and the magic penalties on weapons is taken out. Also, it added Soul or Rebirth and the dialogue makes more sense as far as the characters go.
The anniversary edition also has the Arcane Labyrinth and most of what I said about DoS, but I've broken the DoS version multiple times, so it's better for me. XD