Soldato
i didnt find TW3 encouraged exploration at all tho.
there are no hidden secrets to find. you need to activate a mission via cut scene by talking to someone via map marker and then "explore" via witcher senses.
I use games as a means to escape reality for a bit and just loved roaming around in the beautiful world they created while listening to the awesome soundstrack. Also enjoyed finding a new little village and finding someone to play Gwent with as I got addicted to playing that game. If anything the names above people and animals and repetitive dialogue was a bit immersion breaking, thats another mod |I hope exists, to shut the villagers up and remove name tags.
They could have made exploration better like you say there wasn't much in the way of hidden secrets etc. I also wish the weapons had some lore behind them, rather than just a name. It would be cool to find a new sword and read a bit about it's history and would add a bit more depth to the game.