@Gannon With that said, let me give you a quick run down of what I do. I can totally relate to that “something is missing” feeling.
I start off with a school of species I know I want to keep. For example, if I had a 29, I would add 6-12 Staeck Endlers. After adding them to a planted 29, I sit on it for 30-45 days. I would stare at the 29 daily until ideas would come to me. I would add slowly, but only as it comes to you. Truth is, after a couple of years of doing this intensely, there aren’t many fish or ideas I haven’t heard of. Those ideas or past YouTube videos come to me as I get lost in the 29. It’s a process that requires patience, however 9/10 times, my aquariums stay up for long periods of time because I added what I absolutely wanted.
Hope this helps.