Let's be a little meta: What topics are most hotly debated?

LOL
Every audiophile that knows anything knows to get true bass in ones system you must:

Use class D amplification (everything else is a compromise)

Use SR orange fuses (only)

Run each sub (at least six) though a power conditioner & dedicated transformer that has symmetrical power balanced outlets 

Use only (& I mean only) Kaplan power cables. They may be hard to find but nothing else will do

And for Pete's sake don't expect anything but inferior results if your front end isn't a turntable with a Wheaton arm & Accuphase AC-2 cartridge

You're welcome

@thecarpathian

point taken

i guess one needs to balance being nice and telling the truth

Works for me!

Bass? Hmmm, I thought sure it would be either McIntosh products or cables. 

Cables.
Standmounts v. Floorstanders
Connections
Integrated v separates
Tube v ss v d
Room correction
To sub or not to sub
To sub a lot or just a bit
Headphones
Speaker design
Isolation
Wood v metal stands
Surge, power condioners
Tweeter design
Marketing approach
To test or not 
Test but how
To tweak or not
Tweak but how
Digital sound
Media preference

Not in any order, but I agree that cables generate the most heat, or do they?