Describing a Person's Character:
* She is by nature a very shy person, but she is trying to be more outgoing.
* He is by nature a very optimistic person, always seeing the good in everything.
* My dog is by nature friendly and loves to play with other dogs.
Describing a Thing's Properties:
* This material is by nature very strong and durable.
* The process is by nature slow and meticulous.
* The weather in this region is by nature unpredictable.
Describing a Situation:
* The situation is by nature complex and requires careful consideration.
* This task is by nature difficult and requires a lot of effort.
* Their relationship is by nature one of mutual respect and trust.
Using it figuratively:
* He is by nature a bit of a rebel, always questioning authority.
* The company is by nature innovative and constantly seeking new ideas.
* The city is by nature vibrant and full of energy.
Remember that "by nature" often implies an inherent quality or a natural tendency, as opposed to something learned or acquired.