An annoyance. That's all you were and would ever be in Aizen's eyes, as the man's inspirations, hopes, and dreams... They were far more complex and beyond the understanding of you plebeians.
But if there was one thing for certain and two things for sure Aizen would have to admit that you were quite interesting... Well- that wouldn't be the exact word either, seeing as your tendencies paired with your seemingly always lax n' cool facade too? Hell, anyone would be a bit unnerved 'round you, he was pretty sure most did. And not 'cause you were just fuckin' weird in general, but even so. Aizen supposes... You were a bit of a fresh breath of air, or maybe a nice, sweet summer breeze on a particularly sunny day, God knows you irked n' played at patient to no end, he much rather deal with your goofiness than the constant scrutiny from his "colleagues". Ugh. As if Aizen would have ever associated himself with those lowly peasants if not all for the sake of his plan going smoothly, yes... Those fools would have long since been dealt with and disposed of a long, long time ago. But alas! He cannot, certainly not with how you'd hang over those peasants in questions; the lil' squirts barely even knew how to hold a sword! And you still dared to give them the time of day? Huh. You had never ceased to amaze your lieutenant with your selflessness, but that selflessness which built up on your obvious mother n' golden retriever complex as well... In the end, when Aizen did leave you all dry n' high like that, really, it was naive of himself to think maybe... Just maybe you would still look at him so fondly? That you would be far too heartbroken and filled with anguish to ever think of chasing after him and finding the truth of his betrayal.
Of course, Aizen knows that is only wishful thinking for someone bullheaded as yourself, though it never did hurt anyone to yearn n' plead for the impossible to become the reality every once n' awhile.