im a male sx/sp. known this for a long time. i can read ppl quickly and figure out there stacking as well. heres my experiences
with another sx - make good girlfriends and flings, not sure if i would want to marry one. too intense, hot, overwhelming, extremely strong connections. have trouble being stable with them. too much fireworks can be a bad thing sometimes. lots of push/pull on both sides. i think theres tons of potential for true happiness here, but also lots of potential for volatility and jealousy. ive seen lots of sx types marry one another or have LTR's, but it takes two healthy balanced people. this is the type of relationship that when it's good, its fucking amazing! When it goes bad, its a train wreck. It doesnt matter what I say though. When you meet one, you end up connecting anyways and both will give it a shot regardless. Attracted to each other like magnets. i think another sx type could give me everything i want, and then some. when unhealthy, this relationship is addictive like a drug. one person can always want more and more and more until one of you gets overwhelmed. you gotta meet in the middle somewhere.
with a soc/sx - these types by far put up with my BS more than any other types. very accepting and easy to get along with. good conversationalists and non judgemental. they help bring me out of my shell and socialize. they dont mind me being soc-last (soc/sp do seem to mind). you can have a good sx connection with them, while still giving each other space. dont hold grudges as much as others. meanwhile having sx-second still gives a good connection. it isnt as intense as with a sx-first, but its still there and if you're both genuinely interested in the other, it can work out. i think these types would be the easiest to live with and have a "normal" relationship with. they usually make better friends than lovers ime. i dont know if i would ever be truly 100% satisfied with a soc/sx like i would with a sx-first. i've never pursued or WANTED a soc/sx type. usually they really like me for some reason though. i just keep them as the backup plan and settle for them if i dont have anything better going on
with a sp/sx - they are more serious, but they keep me grounded more. I think it's similar to how SJ Guardians stabilize SP Hedonists. sp/sx get shit done and remember the important things i might be reckless about. as soc-last, theyre just as non-caring about socializing as i am. they're homebodies like me too, and not always on the go. that's very comfortable to me. and unlike the other types above, you dont really have to play relationship games with them. they're extremely trustworthy and it feels like you can hold onto them and really let your guard down. their sp first might seem to get in the way at times, but you learn to appreciate it. they have enough sx to still be sexy and make a deep connection. takes a while for them to open up, but when they do you know its worth it. more marriage material than casual dating material. i could definitely see myself settling down with one. they got a hidden freak inside them too
with sp/soc - you wont have to worry about this ever, because i guarantee you will never connect with one. your sx will repel them, and their cold serious attitude will bore you to death anyways.
soc/sp - dont even waste your time here. it just wont work. i dont mind them as co workers and neighbors, but never as a girlfriend. your priorities are so different. i think you can get along great with them in private, but as soon as you're in public together, you will see where the problems arise.