Tossing enemy (Tiny) while assassinate (Sniper) will be look so awesome, as you can see the bullet
you can use Slark as deward-er at early game, just brought at least Lv.1 Leap (2nd Skill) and some Sentry ward
Saw LC Dueling and she has Aghanim? you use bane? then give one of them Nightmare
Axe is so swag when he's spinning then use his Ultimate
on DotA 1, Sniper's Shrapnel reveal area is so tiny than the DOTA 2
you know its really annoying when Bounty Hunter/Riki/InvisHero with DarkSeer, Ambush by invis and Ion Shell
you can pause anything (include buildings) with Faceless Void's Chronosphere (some of my friend didn't know this

)
If you use Lone Druid, you can use your bear as Hook Shield
BloodSeeker on past was Sponsored by Formula1 GP, now he has possibilities sponsored by Formula1 Rocket
Undying used to be STR hero, but for some reason he has higher INT Gain than STR itself
there are lot of people (including me) when using SandKing always accidentally canceled their "almost-done" channeled Ultimate
Faceless Void has a best combination with Witch Doctor and Lich
Lion and Lina is the best Partner ever <3 you should know the reason already guys xD
if you chase Death Prophet while her Ultimate is active(especially when you don't have blink or some speed boost), prepare to die
you can actually block Techies mine damage with Repel(OmniKnight) before, but now you can't~
Magina(Anti-Mage) and Terrorblade used to be Brothers on DotA, but they don't look like brothers anymore on DOTA 2
Lotus Orb and Blade Mail is the best Target-Cast Counter, especially when the enemy caster is squishy
If you had Octarine Core on Nature Prophet, you can infinitely use Sprout(the cooldown is same as the duration)
Na'ix and Barathrum is the best Partner, Infest then CHARGEE!! <3
Omniknight's "Catch Up" voice was heard like "Ketchup"
when using TimberSaw, if you about to die try to hang a tree then do buy back immidealtly
Faceless Void's Backtrack will still dodge attack even though you had MKB
Wraith King is the most annoying hero in the game, especially when he has RO and Aegis
using Visage? Lich has Aghanim? you can troll people when your Familliars has the Chain Frost
Before Meepo was removed from AbilityDraft, Meepo's ult and Nature Prophet's Nature's Call can make an Army of Treant
Best Combo Skill i've ever heard: Aftershock + Lightning Ball/Mana Shield