For Lincoln the man, read some writings from men who worked in the HQ of the War Department and in the Ohio Light Home Guard which had the obligation to try to keep Lincoln secure, while he seemed to be a fatalist unconcerned with his safety.
Two free ebooks that I recommend fir their portraits of their day-to-day interactions with Lincoln:
Lincoln in the Telegraph Office by David Homer Bates, Google Books
Lincoln's Body Guard, The Union Light Guard of Ohio by Robert McBride.
Also Lincoln was kind, loving and tolerant toward his wife who according to accounts of his associates in the government could be arbitrarily and outrageously cruel to those around Lincoln and herself. Her behavior was so erratic that she couldn't be counted on to entertain at the White House, an obligation that fell on the son and daughter-in-law of Henry Seward and the daughter of Salmon P Chase at their homes. And bills sent to him at the White House reflect her uncontrolled and irrational spending.
Probably all of this behavior would be diagnosed as serious mental illness today, but he stood by her and insisted on her being treated with respect.
In addition, he was known for liberally pardonning Union soldiers sentenced to execution for desertion, especially if they were young.
His telegrams and dealings with his Generals from the Headquarters of the War Department, now being transcribed by researchers at
www.decodingthecivilwar.org and msny already previously printed, show also tolerance and compassion but at the same time wisdom and sound judgment.