No. My reputation is 100 and I have high charisma.
I steal a lot and I believe that guards AI, because I "cleaned" too many containers and pickpocketed too many people, checks "everyone" which includes me. And that is in fact logical - a mechanic similar to Gothic 2 where if you steal too many items in a settlement, it goes hostile on you. And I actually like it because the whole thing persuaded me into caring about speech. Which means talking to everyone about everything and getting certain speech perks. Which again is rewarding on it's own, you never know where you'll learn about a new, rich, "victim".
Another tip. Finding roe deer is like getting a jackpot, those seem too rare in the game. When you get a quest to "smuggle" it's meat, just buy it from a butcher (Ledetchko store has plenty of it, but you can buy it elsewhere).
Note that different questgivers asking for wild animals do not care about meat quality, only about number of pieces you give them. Which means during a certain main story quest where you hunt hare, just store the meat in a camp trunk to grab it later when needed. It's quality will be 0 of course, but since questgivers don't care, neither should you.
Additionally, since you'll have to bring tons of meat in some cases, I strongly suggest getting tier 5 horse, best saddle (with 4 saddlebags) so your overall capacity doesn't pose a problem.
Another one. Stealth mechanics is almost completely broken.
I've posted before that people have 6th sense and sometimes will wake up if you're naked and completely silent while never reacting to clunking noise coming from a fully equipped guard or something.
Also everyone has infrared 20/20 vision and can spot you in the darkest place regardless of their distance. So if you're doing mischivous deeds, make sure noone is faced towards you.
Finally, stealth KO/kill is not silent and for whatever reason will wake everyone up. It's still a viable option to avoid hard trashmobs aggro - stealthkill the bandit boss who is the toughest then deal with his easy to kill sidekicks who all woke up although not even you heard anything.
EDIT:
Most important:
Although there are sidequests related to cumans,
DO NOT kill any cumans NORTH OF UZHITZ before you finish Nest of Vipers main story quest. There is a gamestopper bug if you clear some camp(s) prior to doing the mentioned main story quest:
http://steamcommunity.com/app/379430/discussions/0/2860219962095854641/