Sure, here are some of the most popular YouTube playlists for various interests:

1. Music:
- "Top Tracks - Global" by YouTube Music
- "Billboard Hot 100" by Billboard
- "Today's Top Hits" by Spotify

2. Fitness:
- "30 Days of Yoga" by Yoga With Adriene
- "Home Workout Series" by POPSUGAR Fitness
- "No-Equipment Workouts" by FitnessBlender

3. Cooking:
- "Gordon Ramsay's Recipes" by Gordon Ramsay
- "Basics with Babish" by Binging with Babish
- "Tasty 101" by Tasty

4. Education:
- "Crash Course" by CrashCourse
- "TED Talks" by TED
- "Khan Academy" by Khan Academy

5. DIY/Crafts:
- "DIY Projects" by 5-Minute Crafts
- "Room Decor DIY Ideas" by Nastazsa
- "Craft Ideas for Kids" by Easy Kids Craft

6. Comedy:
- "Just for Laughs Gags" by Just for Laughs Gags
- "Comedy Central Stand-Up" by Comedy Central Stand-Up
- "Funny or Die" by Funny Or Die

7. Travel:
- "Travel Vlogs" by FunForLouis
- "Rick Steves' Europe" by Rick Steves' Europe
- "Expedia" by Expedia

8. Technology:
- "Techquickie" by Techquickie
- "Unbox Therapy" by Unbox Therapy
- "Marques Brownlee" by Marques Brownlee

Remember, these are just a few examples. There are countless playlists on YouTube for every interest imaginable!