Bluegrass Mensa

3D printers and 3D printing

6-mile walks (in warm weather)

Animal Welfare & Sanctuary

Anthropology

Aquariums

Archaeology

Arduinos (single-board computers)

Astronomy

Baking

Banjo

Big cats, especially tigers

Biology

Bluegrass Mensa events

Board games

Card games

Cats (the feline kind, not the basketball kind)

Cats!

Chemistry

Chilling in my sunroom overlooking the lake

Cincinnati Mensa regional gatherings

Circuit boards

Community Service -- focus on the needy, vulnerable, economically-disadvantaged

Computers

Computers and programming

Computer-aided design (CAD)

Computer networking

Computer numerical control (CNC) programming and machining

Computer programming

Conductive anodic filaments (CAF).

Cooking

Crocheting

Cryptograms

Cultural migration paths

Current events

Cycling

Designing and building autonomous robots

Designing and building electronics to be immune to electrostatic
  discharge (ESD)

Designing/building/debugging electronics

Designing quote acrostics  

Detective tv series

Drawing

Digger game

DIY home upkeep and remodeling

Dogs

Eastern Star

Economics

Editing

Embroidery

Engineering

English, its use and misuse

Facebook

Family and friends

Family – grandkids

Family - great-grandchildren

Family – kids

Fantasy

Flower gardening

Flying airplanes

Flying helicopters

Food -- plentiful, tasty, healthful, vegetarian

Folk Tales

Fruit Trees

Fundraising

Games

Genealogy

Geology

Going out to eat

Half-Maine Coon cats

Ham radio (amateur radio)

Healthcare Reform, Evidence-Based Medicine & Applied Health Services Research

Hidden City game

Hiking

History

Homelessness & Hunger Outreach

Horticulture

Hospice Care Volunteering

Human cognition

Human interaction

Hummingbirds

Humor

Ice skating

Insight Meditation

International affairs

International Travel

Inventing

Investing

Jewelry making

Knitting

K-pop, a select mix

Lead-free electronics

Learning about and using electromechanical devices (sensors and actuators)

Learning French

Learning German

Learning how things work and fail

Learning Irish

Learning new things

Learning Norwegian

Learning Polish

Learning Russian

Learning Welsh

Live theater, including musicals

Logic puzzles

Long distance hiking

Magic

Mahjong

Making my possessions last as long as possible

Making webpages

Masonic Lodge

Mathematics
Mensa events

Mentoring

Metalworking

Microbiology

Microphotography

Military history

Missions

Modifying and customizing products and equipment

Movies

Musical humor

Music of many kinds

Mysteries

Mythology

Nature

Nature walks

Netflix

Needlework

Nutrition

Paleontology

Palindromes and other wordplay

Parrots

Personal finance

Pet Rescue game

Philosophy

Photons

Photography

Piano

Poetry

Political theory and history

Power distribution on printed circuit boards (PCB's).

Physics

Problem-solving

Puns

Puzzles

Quilting

Rappelling

Reading

Rock climbing

Running

RV-ing

Sailboat racing

Sailing

Science fiction

SciFi/Fantasy

Sci-fi tv series

Scottish Rite

Scrabble online

Scuba diving

Setting up new research and educational laboratories

Sewing

Sheet-metal working

Skiing

Skydiving

Socializing

Solar panels

Spanish

Spider plants

Stained glass

Stamp Collecting

Stimulating discussions and friendly arguments

Studying languages

Study of religions

Sudoku

Taking classes as a Donovan Scholar

Teaching

Team Rubicon (and other disaster relief/emergency management organizations)

Technical books

Thrillers

Tin pest

Tin whiskers

Transcendental Meditation

Travel

Triathlons

U.K. men's basketball

Vegetable gardening

Vegetarian food

Watching wildlife in my backyard

Water aerobics

Wild cats

Woodworking

Wolf-hybrids

Wordplay

World news

Yoga

York Rite

Zoos