I read a lot here but write much less. I don't see the point in chasing reputation other than to offer bounties, which I've lately noticed could be quite useful.
My top tag here is currently 'java' despite rarely using it. I'm a polyglot programmer but currently I mostly use C++ (and understanding the trade-offs I quite like it).
Stack Overflow
Q&A for professional and enthusiast programmers
Programming Language Design and Implementation
Q&A for designers and implementers of computer programming languages
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Open Source
Q&A for people organizing, marketing or licensing open source development projects
Music: Practice & Theory
Q&A for musicians, students, and enthusiasts
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Artificial Intelligence
Q&A for people interested in conceptual questions about life and challenges in a world where "cognitive" functions can be mimicked in purely digital environment
Retrocomputing
Q&A for vintage-computer hobbyists interested in restoring, preserving, and using the classic computer and gaming systems of yesteryear
Server Fault
Q&A for system and network administrators
Area 51
Q&A for proposing new sites in the Stack Exchange network
Computer Science
Q&A for students, researchers and practitioners of computer science
Aviation
Q&A for aircraft pilots, mechanics, and enthusiasts
Law
Q&A for legal professionals, students, and others with experience or interest in law
Proof Assistants
Q&A for mathematicians and computer scientists who develop and use proof assistants
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Ask Ubuntu
Q&A for Ubuntu users and developers
Literature
Q&A for scholars and enthusiasts of literature
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
User Experience
Q&A for user experience researchers and experts
Gardening & Landscaping
Q&A for gardeners and landscapers
Medical Sciences
Q&A for professionals in medical and allied health fields, students of those professions, related academics, and others with a sound understanding of medicine and healthcare-related sciences
Ask Patents
Q&A for people interested in improving the patent system
Super User
Q&A for computer enthusiasts and power users
Software Recommendations
Q&A for people seeking specific software recommendations
Hardware Recommendations
Q&A for people seeking specific hardware recommendations
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
Physics
Q&A for active researchers, academics and students of physics
Engineering
Q&A for professionals and students of engineering
Video Production
Q&A for engineers, producers, editors and enthusiasts spanning the fields of video and media creation
Game Development
Q&A for professional and independent game developers
Lifehacks
Q&A for people looking to bypass life's everyday problems with simple tricks
Operations Research
Q&A for operations research and analytics professionals, educators, and students
Data Science
Q&A for Data science professionals, Machine Learning specialists, and those interested in learning more about the field
Robotics
Q&A for professional robotic engineers, hobbyists, researchers and students
Sound Design
Q&A for sound engineers, producers, editors, and enthusiasts
English Language Learners
Q&A for speakers of other languages learning English
The Workplace
Q&A for members of the workforce navigating the professional setting
Linguistics
Q&A for professional linguists and others with an interest in linguistic research and theory
History
Q&A for historians and history buffs
Graphic Design
Q&A for Graphic Design professionals, students, and enthusiasts
Politics
Q&A for people interested in governments, policies, and political processes
Quantum Computing
Q&A for engineers, scientists, programmers, and computing professionals interested in quantum computing
Space Exploration
Q&A for spacecraft operators, scientists, engineers, and enthusiasts
Mathematics
Q&A for people studying math at any level and professionals in related fields
Parenting
Q&A for parents, grandparents, nannies and others with a parenting role
Biology
Q&A for biology researchers, academics, and students
Worldbuilding
Q&A for writers/artists using science, geography and culture to construct imaginary worlds and settings
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Writing
Q&A for the craft of professional writing, including fiction, non-fiction, technical, scholarly, and commercial writing
Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
Academia
Q&A for academics and those enrolled in higher education
Web Applications
Q&A for power users of web applications
DevOps
Q&A for software engineers working on automated testing, continuous delivery, service integration and monitoring, and building SDLC infrastructure
Motor Vehicle Maintenance & Repair
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts