You go girl! I've had aquariums for about 45 years now and I've had just about everything at one time or another from Saltwater to Pond Koi. The Oscars were nice, but I like a nice looking tank and love my live plants, with the Oscars nothing ever stayed where it was put except the rocks. I liked the Angels until they started breeding like rats and then all my free time was spent growing out babies, feeding, cleaning, and pedaling them to LFS to sell, (couldn't just let them get eatten). For the past 1 1/2 years I've had Discus and they are my all time favorite, they captivate me for hours, I watch them instead of TV. Of course you know how it goes.... now I also have some Apisto's and Rams now and I've got them peppered throughout my tanks. Bottom line is go with what you like and gives you the most enjoyment, your taste will change with time and so will the contents of your tanks. It's a personal thing and no one can really tell you what you should stock, do what feels right for you. Good Luck with choosing your stocking and I hope everything works out well with your knee!