The phrase "always really thought" is correct and usable in written English.
It can be used to express a long-held belief or opinion that someone has consistently maintained over time.
Example: "I have always really thought that honesty is the best policy in any situation."
Alternatives: "have always believed" or "have consistently thought".
For example, it is certain that if we see bodies we in some cases see a body move, but it is also certain that we cannot possibly ever see a body move; for in spite of what the followers of Einstein say, motion is, and is always really thought of as, absolute, relative motion being a contradiction in terms.
I've always never really thought of myself as creative and I guess being a science major people don't think of you as creative when you tell them that.
A warm, generous and gutsy lady who always told us what she really thought.
"I'd always enjoyed acting, but I never really thought I'd get into doing it professionally.
Though she said she was always an avid reader, she never really thought of herself as a writer, until she began putting pen to paper.
A little personal, as I barely know you, but it means in reality that I've always used both hands, and never really thought too much about it either way, you weirdo.
Celebrities get asked a lot of random questions and we're not always sure they really think about their answers.
This sounds obvious, but in practice it's very difficult, because people, even high-level executives, have a hard time always saying what they really think, and because we tend to surround ourselves with people we agree with.
A key success factor is to periodically test to see how your customers' perceptions have evolved - to always know what they really think about your firm.
But then, we don't always know what more conventional politicians "really" think, either; nor are we always sure that we care.
"I always asked questions, and I really think that's where my game has expanded, just being a student of the game".
