Favorite - Phoenix
Most Hated - Vassili (When I see multiples on my team)
Most Useless - Phantom
Favourite Merc, Most Hated one and the most useless?
Fav – many of them. Phoenix, Sawboner, Fragger, Proxy, Stoker’s accent
Hated – Rhino; Redeye who toss his smoke nades to perfectly cover enemy position/objective
Useless – Redeye, clueless Vassilis, non-ninja-level-Phantoms
I did not delete my comment. Why did my comment get deleted?
The comment was just
http://i.imgur.com/PrTZyt1.gif
I could swear to god I posted here before… … … or… unless it was similar topic or something…
Favorite - Arty, Phoenix, Stoker, Proxy and Nader.
Most Hated - Redeye. No matter if it’s enemy or friendly. Vassili if there’s any more than 1 of them in my team.
Most Useless - Recon mercs. Aaaand Arty outside of Bridge and Chapel
@Sniff It wasn’t deleted. It was marked as an answer to the question and placed on page 1.
Why use Arty when you have Skyhammer whose marker can be used as a grenade indoors?
Phantom is great and super annoying to the enemy team if used in the right hands 
Favourite - Fletcher
I’m slowly getting better at sticking people…
Hated - Vaseline, when I have 3 useless level 6s playing on my team, or when I’m up against a sniping god
Useless - Phantom, he’s not invisible, not that tough, doesn’t have a special offensive ability, and can’t spot people
Favourite - My 2 main medics, Sawbonez & Aura / my heavy punch man, Fragger & my first bought merc and fav girl, Proxy
Hated - This would be any character played by someone who’s really good at them (better than me), especially good Fletcher players, they seem so OP (in the right hands). I have some special general hate towards Phantom though…
Useless - Redeye, up to now I have only encountered 1 player who could play him efficiently, the others were just playing like a weaker version of Vassili.
Favourite: All the mercs…because all of them have a purpose, depending on map,objective or team 
Hated: Kira and Sparks, just for the reason that i dont have them in my squad 
Useless: Hackers and teammates that dont use their mercs ability to help the team 
Favorite: Fletcha! And the underrated Aussie, Redeye.
Hated: Rhino. I hate Rhino so, so much. I HATE RHINO.
Useless: I like him, but Phantom is kinda useless. He’s basically an assault class with less killing ability than the other assault classes.
Favorite: Fragger
Hated: Sparks (Why have any other weapon than the revivr)
Useless: Phantom
It’s sad to realize that I am one of the few who really appreciate Arty =(
Abbadon
Abaddon
Favourite > Sparks
Most hated > Rhino
Most useless > Redeye when they blind their own team…
Aw guys don’t bust on Arty so much. At least he can drop artillery quicker than Skyhammer and regens his artillery quicker. Yeah indoors he stinks, but outdoors I use his drops as objective denial and to catch people off guard in Marketplace.
But here is my list…
Favorite: Proxy
She can lay down mines on objectives and they sorta blend into the scenery in some maps. Also with the right loadout card, she gets a machine gun instead of a shotgun, which is better for my style of play.
Most hated: A tossup between Phantom or Sparks.
It always seems that if the other side has one, they are an all star gamer. But if my side gets one, they can’t tear a hole in a wet paper sack, making them useless. I was in a game once where the Sparks gave up on her revive gun and was helping up the fallen the old fashioned way. :o
Most Useless: Redeye.
I have Redeye, and I like the character, but the smoke bombs really serve no purpose. He’s a sniper with no heartbeat detector and his infrared goggles don’t last that long. But he is one cool looking merc though…