Which channels do you subscribe to on YouTube and why? Which one is your most favourite? Do you watch those channels regularly too?
I have a few subscriptions, like VSauce (my favourite), Khan Academy, ASAPScience, Mental Floss, Crash Course, Pianist Miri, Ed Sheeran, Arabic Khatawaat and Wisecrack.
Thats a good question. I would luv to see subscriptions of all fellas.
Personally I dont subscribe to a lot of channels but here is my list:
Nauman Ali khan
TED
Fitness blender
Jimmy Kimmel Live
The tonight show starring Jimmy Fallon
Eli the computer guy
Till Boadella
Awakening music
Michael bubble
AIB
Rohail Hyatt (the original coke studio)
willow TV
Haha, looks like we are the only two YouTube junkies round here!
I think there is so much more to avail from YT. We actually dont use it enough to get most out of it
I've subscribed only 1 channel which is, Sethi Say Sawal..
I'll loosely follow some but I'm not really subscribed to any of them. And the ones I may have subscribed to long ago, I no longer follow.
My kids use youtube on my account, so my subscriptions are a mixture of disney and cartoon network.
Hassan Minhaj’s Patriot Act
Nouman Ali Khan’s Bayyinah Institute incliding Omar Suleiman
Yasir Qadhi
Yaqeen institute for Islamic research
Freshly Grounded
Coke Studio & Nescafe basement & Playground Studio with a bunch of Punjabi and bollywood music channels.
ARY digital & HUM TV & Har pal geo for pak dramas 
And then a bunch of vloggers and singers but I won’t bore you with those.