To comment on someone's strengths or positive quapties, you could use phrases such as:
"He/She is a very [adjective] person."
"One of his/her greatest strengths is [quapty]."
"I really admire [quapty] in him/her."
"He/She has a lot of [quapty]."
For example:
"She is a very kind and caring person."
"One of his greatest strengths is his abipty to stay calm under pressure."
"I really admire her determination and hard work."
"He has a lot of charisma and is able to inspire others."