general gamesense

tracking ability

good aim
good sandvich
doesnt overcommit and die (or let medic die)
doesn't tunnelvision pointless targets
good hats
trust me i have 60 hours and a plat official under my belt

skyrollaaaaaaaaaaaaaaaaaaa

what do you mean good sandwich?

Since heavy is so fucking slow, the most skilled heavies are masters of position and timing.

polk

Try to hide your fat ass behind something and drop the med, thats a good heavy :D

good sandvich has to do with timing and awareness. if you can throw it exactly when your medic needs it without too much overheal that is nice. if you can throw it out to a teammate and then regen it back before your medic needs it that is also nice. if you can toss it with good aim that's style points. and lastly the timing of it -- if you pull it out, those are precious seconds where you don't have your gun out and aren't revved so you better do it at the right time.

depends on what steering wheel they use.

arms and basic brain stem function

looks at scoreboard 24/7 to know when its "SPY TIME"

450hp

abusing props and shooting deathbullets out of your fucking eyes while 90% of your body is covered

or you can just play engineer

this:

http://youtu.be/TLMBsMbj6BQ?t=18s

Lobby stats

Heres three tips that a team wants in Heavy Weapons Guy:

1. Most of the team will look at the heavy to see where the team is pushing so being in the right forward position will greatly affect where your team is.

2. Protecting your medic. (duh) Your medic should be following you along with your demoman. This doesn't just mean good tracking and killing things to protect your team but also standing in the right place.

3. Making room to push is a pretty big point for heavies and demos. Since you are capable of putting out massive damage, clearing an area by either killing or forcing out enemies is a big deal. When done correctly the rest of your team can enter an area much more easily.

360 spinups

Dont bait your team like i see a lot of heavys do, position yourself smartly to where you can defend them. Just simply kill things that try to attack your med and demo. A lot of better heavys don't soak up large amounts of heals, rather they let their demo take them. It is also just as much the heavys job to spy check as it is the pyros. Also, dont underestimate the fists of steel :D

Learning who to shoot when given multiple targets can be important. Some heavies see a Medic and a Demo and can't choose who to target.

Overextending, another huge error that a lot of beginner heavies in comp make. Learning how important it is to stay alive, even if it means abandoning a fight, is a huge thing. Despite your DPS, you will lose most battles of 2+ versus 1.

That's all I can think of. Make sure your mouse has a left mouse button.

A medic

Get 450hp and stand in smart spots and be able to track. Yeah the class really is that easy and simple. You should stand in more aggressive spots when the sniper is dead and/or your demo is also doing the same. Look behind you a lot too cause you're the easiest track to run down as a spy and your medic has more important stuff to do than spycheck.

Bad heavies will stand away from their team, in positions where they get spammed out, or sniped or stabbed a lot.