If you can find a Turkish friend or a guide it will be more easy for you, because you cant find so many people speaking English. Besides, Eastern part is full of natural beauty, also you can go Antep, urfa, maraş, I think you wont regret. Lastly, we love Koreans we would be happy to see you in here  :)

As long as you are travelling with a touring agency or with a trusted guide, it is completely safe. Do not get the vibe there are warfare conditions on the east side, just because of you hear on the news. The east side is a huge area and people are still living there safe and sound. And i believe you already want to visit historical places or natural parks which are mostly far away from the danger zone (if there are any danger zone at all) Just don't travel alone without a local turkish guide.

you dont need to worry about. i live in Van . The people here until at least the western friendly.Here also a lot of natural beauty.You will definitely not regret :)

hi, I have been living for 30 years in çekmeköy-istanbul. Western of turkey is safe  a space that is why you don t worry .  you supposed cities are very nice and everybody of life where most travel to see one times. but at the moment east borders of turkey isn't safe. Especially syria -Irak . I think you should visit  later  . Take care

dont worry just there re many syrıan refugee so east of turkey ıs lıttle complıcated as many of cıty ın turkey. just be careful about robbery :) ı hope ıt can be a good travel for you