No it's not, in fact, I hear from many Aquarius/Scorpio couples. I believe that Scorpios can read other people like a book. But Aquarius people are so complex, it's a big challenge for a Scorpio to do that, so it keeps them interested! Aquarius isn't used to being loved as passionately as by a Scorpio, so is surprised by this in a good way. So it is a good pairing.
Normally, with an air sign Sun and fire sign rising, I would steer you towards air and fire signs. Since you have Sag rising, it's possible you have planets in Scorpio, and that's why they interest you. I wish you gave me the Moon and rising sign for the Scorpio. But if you are attracted to them, and it works for you, go for it!