I've been trying to 'hide in shadow but nothing is really happening and i'm not gaining any experience in the skill when i did sneak up behind someone. Some explaination on how-to would be nice.

i'm just trying to sell at an average price so i'm not cheating people or being cheated

(1) I think that NPCs should have a larger accepting vocabulary. Like i'll say: __(Full NPC Name)__ sent me to give you _______ (this item). and almost all the NPCs will say that they don't understand you. If hope that more variations of phrases will be accepted soon. I had to say just the first name. It simple, but a little annoying when they say you're not being specific enough, and you said a super specific thing. And then they accept "So and so sent me."
(2) Also i would like for NPCs to tell specific directions. They all say the same thing. It should be the farther an NPC is away from something, the more general and object oriented their direction should be, but if you ask a closer NCP they'll tell you turn (left right) / Go 3 building down and to the (L/R) _Place sign_ Can't miss it.
(3) You should be able to barter with NCPs by saying (/120 tria) when the price is higher and get a good price. The higher the charisma the lower the price you can barter.
(4) NPC should tell you what they're selling if they have something to sell. Like i've got a few _____ at a low price today. So it'd be more realistic like a real market.

These are some of the things i'd like NPC to say and do in a little while. Maybe even a little more simple.