I'll speak up here from a Pisces/Scorpio point of view and give some insight into these two "complex" water sign. Are we that complex? I don't think so, but we hear it all the time, don't we? Here's a little background: I'm a Pisces with a Sag Moon and a Scorpio rising, Mercury in Aries.
Partly due to my Sag moon, I'm not the "typical" (textbook) Pisces. As Voron says, I don't do well with chaos, but I occasionally enjoy peeking into chaotic situations. PEEKING being key here--I don't want to live in it. If I do (and I have), I become a mess. Dreamy? Yes, but I can be fairly grounded and practical, too (other planetary influences).
Sensitive as a Pisces, but also a tad rash/impulsive, which falls on the Aries and Sag in my chart (yay, fire signs!). If you make me really angry--and you must push me REALLY hard for me to get there (a typical Pisces quality)--I can calmly and quietly cut you off at the knees (Scoprio rising), without the use of profanity, angry outburst, or without belittling you for the heck of it. I see right through people (Scorpio rising and Pisces sun), and it's what gives me the very cutting tongue (Aries Mercury 'oompf'). In case of extremely (rare) anger, I'll tell you exactly why you think/act/feel the way you do (all too true, but who wants to hear THAT much truth, eh?). Scorpio rising takes no prisoners! The darned Scorpio is merciless.
My Pisces sun is sweet, gentle, naive, forgiving (to a fault), and extremely patient. Scorpio rising puts up a coolish front, and observes (Page of Swords style) others from afar until astute assessments have been made. Scorpio qualities can be a little scary that way. But I kinda likey..
Here's the breakdown of my feelings towards Water signs:
Cancers: These folks can be sweet and maternal (yes, even the men), but they are clingy, needy, and SO overly emotional. They can cry at the drop of a hat, for heaven's sake! I can take them in small doses but I don't or want to understand ALL their many moods, and I find them too much of the recluse/hermity type. And when they make up their mind about something, right or wrong, they react from such an emotional and illogical place that it makes me insane. My motto: "Love you cancers, but stay over THERE. Don't come too close."
Scorpios: They love me a lot, and I love them back, but we can irk each other, too. Too much (Scoprio) tail wagging going on between me (Scorp rising!) and them, so it can get a little intense sometimes, but I find them fun and a little (good) crazy, so it's okay to hang out with them. They can get a little melodramatic, but they don't seem to mind when I gently and jokingly tell them to get over themselves--they can tell it's not coming from a bad place, and they laugh it off. I can lighten their mood like nobody's business, and it makes for good friendships, usually. Dating them is a WHOLE other ball game. Jealous, possessive, possessive, and..possessive. Even when they try to hide this aspect, puh leez, they can't hide a THING from me...which they love and hate about me. Scorpios love to be "understood" on a very deep level (and we Pisces "get" them), but they also are paranoid about being understood at the deep, gut level. But they must like it more than they hate it, because they can't stay away from me.
Pisces: I'm sorry, but for the most part...I don't gel with my own people. Not all, but most, tend to be the "stereotypical" Pisces...too dreamy, too submissive, too addicted to something bad, too mellow, too in their own heads, too on another planet, too...too much. Intuitive as all hell, though, and very psychic and quite sweet--but I think I can be a little too intense for them at times. Male Pisces like me okay, but the women can be nervous around me because of my rash and impulsive tongue. I get it; I can be insensitive sometimes (blame the Sag moon ALL the way for this!), but calm down, Pisces people. (Not all of you; some of you I love, and you know who you are!). I don't bite--hard.
GA