My list of OTP - Sim couples
1) Lacelot - berrysweetshoppe's Merlot and Lacey They have shared a number of adventures and lifetimes together. Well known and loved, they have been used by many since introduced by Berry.
2) Hibilus - zashaspectrum's Hibiscus and winterhame's Nautilus - and their alternate incarnation of Derek and Nathan. Through many AUs and many incarnations - their love is always true.
3) Miguel and Drake (if they have an official ship name, I don't know it.) Serenasims and lilinabe's sims. Unlike some of the others, I only know of one time when this pair get together. But they are such an adorable and adoring couple that they make the list.
4) Travis Kane and Jade Greenwood - kaleekalo and one of the pre-mades in Twinbrook.
How did they get to be an OTP? Well, at least twice, I have dropped Travis into Twinbrook. And both times, he ends up with Jade on his own. Some part of me thinks it might have been three times but I'm positive about two. Add in that he married Jade in kaleekalo's story and seriously, he has a thing for Jade.