1. Noobs play with a mountain of gain and a tiny bit of volume; - pros record with a tiny bit of gain and a ton of volume
2. All of your favorite tones have way, way more high end than you think they do
3. Noobs focus everything on their left hand technique, pros focus on their right hand technique
4. All high gain tones need to be AT LEAST doubled, and in most cases quad or sextuple tracked
5. People who say "X speaker is the best and sounds EXACTLY LIKE THIS" are full of shit - all speakers are HIGHLY variable.
6. You need at the very least, 2 57s, a 421, a 121, and a SM7B to be ready to record any guitar sound.
7. The less gain there is in the sound, the more "the room" needs to show up in the recording.
8. Your headstock tuner makes you look like a dork