Lets evaluate your options here
-Omnicock: Due to his time on Earth he's different than other viltrumites. He's a good listener, he'll talk you through it, he's open to exploring new things if it gets you off. He's about 8 inches and thick and is a beast at foreplay and always gives aftercare
-Thraggcock: As the grand regant of Viltrum he's rough and dominating. He'll ruin your holes but still care for you and cry when you arrive as he did when viltrum was destroyed. He's about 13 inches and curved to the right. He has a breeding fetish so you'd probably get pregnant 50 times at least
-Taking both at the same time: They have a viltrumite war with you but in the end Thragg wins and makes Nolan watch as a cuck. He still cries after though because during the heated battle he offered Nolan a truce and forgiveness if he accepted polyamory but Nolan refused, once again turning down an opportunity to return to the honor of a viltrumite soldier
Who do you choose?