Different classes' "MEDIC!" calls rated by how they make me feel.
Scout:
Very distinguished, moderately loud, but his "Let's go, Doc!" sounds like he's inviting me to kill some bitches, not heal a bastard. Which isn't a problem per se, but I have the maximum damage output of a slug. Love the "Alright, I feel good!" though, makes me think myself accomplished while still remaining impersonal, great job. 8/10.
Soldier:
Professional, straightforward, matter-of-factly. Short but loud enough to be easily heard from a distance. "You deserve a medal!" is one of the best reactions to getting healed. 10/10.
Pyro:
Way too quiet, baby, I'm sorry, you probably have to press it fifty times before I register your voice as something other than the vaguely sexual noises from my neighbors' bedroom. 6/10.
Demoman:
Way too long, Jesus fucking Christ. I hear him hollering from across the map. He starts that "MEEEEEEEE-..." and by the time he's done with the "...-DIIIIIIIIIIIC" I've got him at full health. And what's that? You didn't need my help? 3/10.
Heavy:
He sounds like he's calling for his husband (true and real and canon). "I love this Doktor!" is easily my favorite response. Brought down only slightly by the tendency of some players to expect me to pocket them. Which. I mean. You got that massive pool of health, you can take a hit. 9/10.
Engineer:
So very polite. So eloquent. If anyone hurts him again, I will cry. I want to kiss him on the nose and protect him forever. "You're alright, Doc!" awww, you aren't half-bad yourself, you handsome devil. 10/10.
Medic:
He sounds like he's dying all the time, but if there are two Medics on the map, you bet your ass I'll heal the fuck out of my labcoated brother, if only because I know what it's like to be a high-priority target. Still too overdramatic though. 5/10.
Sniper:
Oh, you gotta really hurt him for him to call me. Especially love those interactions where a shy Sniper will hold back on the call until he's at 1HP, then see me healing him, and get a bit more confident calling for me in a pinch. I mean, they're hella useful near the front line, but most often they don't survive long enough without at least some heals. Anyway, that "Thanks, mate!" warms my heart, 7/10 but only because it's too quiet.
Spy:
French, 0/10.
That's it, hope you enjoy!