ISTPs, also known as the Virtuoso personality type, are typically best friends with individuals who share similar interests and values. They tend to form strong bonds with people who appreciate their independent and adventurous nature, as well as those who can keep up with their spontaneous and action-oriented lifestyle.

Here are some types of individuals that ISTPs often find themselves being best friends with:

1. ESTP (The Entrepreneur): ISTPs and ESTPs share a love for excitement, thrill, and living in the present moment. Both types enjoy engaging in hands-on activities, exploring new experiences, and taking risks. They can easily understand and relate to each other's need for freedom and autonomy, making them great companions for various adventures.

2. ISFP (The Adventurer): ISTPs and ISFPs share a similar preference for practicality and a love for the outdoors. Both types enjoy exploring nature, engaging in physical activities, and appreciating the beauty of the world around them. They can bond over their shared sensory experiences and their ability to live in the present moment.

3. INTP (The Logician): ISTPs and INTPs share a common preference for logical thinking and problem-solving. Both types enjoy analyzing and understanding how things work, which can lead to engaging discussions and debates. They can appreciate each other's independent and introspective nature, often enjoying deep conversations about various topics.

4. ENTP (The Debater): ISTPs and ENTPs share a love for intellectual stimulation and exploring new ideas. Both types enjoy engaging in debates, brainstorming sessions, and challenging each other's perspectives. They can bond over their shared curiosity and desire to understand the world around them.

5. ISTJ (The Inspector): ISTPs and ISTJs share a preference for practicality, efficiency, and a focus on the present. While ISTJs tend to be more structured and organized, they can appreciate the ISTP's ability to adapt and think on their feet. Both types value loyalty and reliability, which can form a strong foundation for a lasting friendship.

It's important to note that while these are some common types that ISTPs may be best friends with, individual preferences and compatibility can vary. Ultimately, ISTPs value genuine connections and friendships with people who respect their need for independence, share their interests, and can keep up with their adventurous spirit.