That's the best feeling, right? And it's a really good indication that you're on the right path with your artwork! Never forget what that feels like, because when you do get lost in the artistic wilderness again - as we all do - that feeling will be your guiding light. If you know what it feels like, you can seek it as you explore, and when you feel a glimpse of it, continue making the kind of work which generates it. We rarely stay static as artists, so knowing what to look for when we feel lost and blocked is vital.
As for your style, it's nice and clean, and you're nailing the colours! Something I'd encourage you to look at, other than what you mentioned above, is more precise lighting. Since you're not using lineart, you can't rely on it to define volume or form; your shape language and lighting need to do the heavy lifting there. On some of your pieces, it's really good, but on others the light source is unclear, and that makes for an image which is confusing to digest. It's clear you can do this, it's just applied inconsistently - so making sure it's one of your primary focuses when planning a piece will be a good habit to cultivate.
