Divinity II: Ego Draconis is well worth a look. One person described it as being "like Gothic and Two Worlds had a baby, and that baby ate a dragon to become even more awesome". It is a very enjoyable experience with some novel design ideas and multiple solutions for most non-story quests--do you help this trader so he will lower his prices, help that other person who wants him dead/arrested/etc. (which will make him raise his prices), or help him and then betray him anyway to get rewards from both parties? When you have finished helping someone do you say nothing and get a normal reward or specifically ask to be rewarded and possibly get an inferior one instead of something better? All these options are open to you. Reading people's minds (an ability you get at the start of the game) costs experience points but can open up new quests or quest solution options that are otherwise unavailable, or you might just find out what that person plans to have for dinner. In addition to the normal rewards when finishing a quest you also get to choose a bonus reward from a small pool of rewards, and this opens up more hard choices; do you take that magic necklace, or is extra experience more valuable? How about some gold to be able to afford that nice weapon that guy was selling?
The main story gets more action-oriented and less conversation-driven near the end, as is to be expected from most RPGs, but it ended at the very point when I felt it was getting a bit repetitive, and this feeling only came about because I had been slogging through optional areas to complete some side quests. In addition to the usual combat and magic there are also complicated alchemy and enchanting systems; I didn't really get into this much but there are a vast number of potion recipes and enchantment formulas to collect (some of which are very rare), each needing the appropriate ingredients to get the effect you want.
Playing the previous two Divinity games is not necessary to understand the plot, but if you're interested the first game is available right here on GOG.