This is just like a general question, but which of the turtles do you think would be the most gentle vs so rough you can't walk for YEARS {exaggeration}
Outside of mating season? I still think it would depend on circumstances, I can see them all being gentle and rough.
I think Raph would overall be the gentler one. He's HUGE, and he's terrified to break you. Your guys first couple times having sex is mainly just him using his mouth or fingers to get you ready to take his cock. He is mainly focused on your pleasure than his, though he does love when you try to make it up to him after. When he feels comfortable trying to go inside, that too is a process. He tends to take things very slow and gentle to make sure you can handle him, and once he knows you can then it can slowly ramp up to being rougher. You've... had to replace the bed several times cause Raph keeps breaking the headboard from gripping it too hard or the mattress frame caves in from force of the act itself. Mikey is 50/50. He doesn't have to worry as much about hurting you, but he is a sap for more slow and romantic sex. He loves just endlessly praising you and leaving kisses to your jaw, neck and shoulders while he slowly thrusts into you. But there are times where he can be rough. He likes the idea of having so much control over you, that he can control whether you cum or not- and how many orgasms he can pull out of you. Of course, he's still a huge sweetheart during aftercare- but more than once has he had to carry you to the bathroom to get you cleaned up because your legs feel like jelly. Who is the roughest is a tie between Leo and Donnie. While Raph ends up breaking more the things surrounding the two of you, the twins more often break you more than anything. Toys, ropes, collars, you name it- they have done it to you. Leo, the ever-smug bastard likes to tie you up and keep vibrating toys inside you. He'll sit back and watch as you squirm, moan and beg while he jerks himself off. This can sometimes last HOURS, depending on how merciful he's feeling. Though however, he is a sucker for soft sleepy sex. He'll hold you close to his plastron as he thrusts into you from behind, leaving little kisses on your shoulder as he whispers praise and how much he adores you. Donnie is fairly the same, though he does like to be more involved as he teases you with toys. As a sex machine is pumping into you, he'll throat fuck you at the same pace. Or he'll have you in his lap as he works, his cock stuffed into you but not allowing you to move while a vibrator is pressed against your clit on the lowest setting. He likes pushing your limits, always wanting to push just one more orgasm from you- just to see how much of a mess he can make you. Though he does have his moments where he just wants to appreciate you. He is HEAVY on the body worship, and will take his sweet time as he kisses and praises every inch of your beautiful skin.
So yeah, Raph is the roughest in terms of property damage- but Donnie is pretty much the roughest when it comes to breaking a person. But in terms of mating season, you are bound to bed rest for weeks no matter who it is.