Someone who constantly thinks and reflects on various topics can be described as contemplative or introspective.
This expression is often used to suggest that someone is being bold or daring without thinking about the consequences. It implies that the person is acting rashly or foolishly.
"Reading without thinking leads to a cluttered mind overwhelmed with information. On the other hand, thinking without reading can result in a lack of context and depth in one's thoughts, making them unbalanced and uninformed."
"Thinking of you" implies that someone is actively keeping you in their thoughts, whereas "thinking about you" could refer to simply having thoughts about you, without necessarily having you in mind constantly.
To do something without thinking about it means to act instinctively or reactively, without conscious thought or deliberate decision-making. This type of behavior is often driven by habit, emotion, or reflex.
A person who acts without thinking is usually called "impulsive."
sudden movement
cleanshaven.
nostalgic
It means that a person has spoken without really thinking. Most of the time it is used in reference to bragging without backing it up or talking without thinking of the consequence.
If you continually think about someone, there is a possibility that they may also think of you. However, thoughts and feelings are subjective and can vary from person to person. It is not guaranteed that someone will always be thinking of you just because you are thinking of them.
impatient
A Slave
Chatterbox is the word you're thinking of !
Detailer may be the one you're thinking of.
You might call that person an ascetic, or an eremite (hermit).
benevolent person