noun, na-adjective, noun which may take the genitive case particle 'no'
tendency to get deeply absorbed; perfectionism; fastidiousness
Describes a personality trait of becoming intensely focused on a hobby, work, or detail, often to the point of obsession. Can be positive (meticulous) or negative (obsessive).
彼は凝り性で、趣味の模型作りに没頭している。
He has an obsessive streak and is absorbed in his hobby of model-making.
凝り性な性格なので、仕事の細部まで完璧に仕上げたくなる。
Because I'm a perfectionist, I want to finish every detail of my work perfectly.
noun
susceptibility to stiff shoulders
Rare, literal meaning: a physical tendency to get stiff shoulders. In modern usage, the figurative sense (sense 1) is overwhelmingly more common.
凝り性という言葉には、肩が凝りやすい体質という古い意味もある。
The word 凝り性 also has an old meaning of a constitution prone to stiff shoulders.