Sexual styles and history vary so much depending on the ship, whether they’re mortal or immortal, the age of the character, and so many different factors… 

What your really asking is about relationship dynamics, the balance of power, the level of dependency on eachother, the amount of trust, how often they’re even in the mood, etc. All those things fluctuate over time.

Lestat wanted to answer this in a snarky way but I’ll try anyway:

Lestat

• Style w/ mortals: He’s always enjoyed taking the Little Drink while snuggling after sex, or during. This is how he can get away with having innocent blood now and then, as a treat. He tends to top.
• Style w/ Louis: In the past, he would have to get Louis so worked up with foreplay that he’s completely begging for the D, or blood, or both. Currently, Lestat loves it when Louis takes control and bosses him around. 
• History: There’s fanon out there that suggests he was sexually abused as a child, well into his teens. I think that would help explain his difficulty in learning how to love properly, as he comes across as overly sexually demanding (like literally throwing himself on Louis), at least in movie!IWTV. 

Louis: 

• Style w/ mortals: Louis doesn’t have sex with mortals (except one OC that I won’t mention YET AGAIN) bc he doesn’t get that close to mortals. But he does get crushes on them occasionally, like Babette Freneire.
• Style w/ Lestat: See above. In the past, Louis was conflicted in his feelings for Lestat, his first (or second) male lover, and would prefer Lestat to be the aggressor, and then punish himself later for enjoying it. Currently, Louis especially enjoys calling/sexting Lestat during business meetings and getting him painfully turned on.
• History: There’s fanon out there that suggests Louis had one male lover before Lestat, but for the most part, his sexual history was just getting drunk and sleeping with prostitutes. He had issues equating sex with love, it took him a long time to learn it, and is now very comfortable with expressing his feelings sexually. 

Armand: (I really should leave this to the Armand and Daniel RPers)(BUT I CANNOT LEAVE A QUESTION UNANSWERED IT IS A PERSONAL FLAW)

• Style w/ mortals: Armand doesn’t have sex with mortals unless he’s sharing them with Daniel. Armand wouldn’t kill these, he makes sure they get home safely.
• Style w/ vampires: I would imagine that Armand was a generous lover with Louis, almost always the one to initiate. Currently he can be a bossy bottom, and likes it when his lovers initiate. 
• History: he was in brothels as a mortal, and it took him some time to learn to trust others. Marius was his first loving relationship, and Armand was rebellious then, seemingly unable to accept gentleness, because of his past.

Marius: 

(I really should leave this to the Armand and Marius RPers)(BUT I CANNOT LEAVE A QUESTION UNANSWERED IT IS A PERSONAL FLAW)

• Style w/ mortals: Marius has occasionally slept with the models he paints. He is always in control of anything that happens.

• Style w/ vampires: Marius has occasionally slept with the models he paints. He is always in control of anything that happens. 

• History: We don’t have much canon support for Marius’ sexual history, but he did have a long term ship with Pandora in which he was unable to get it up on their wedding night but y’know, performance issues, it’s not uncommon. One out of five…