Hi. I just found my way over to ATP from another site. Been out of the garden forum loop for a while. I love mixed pots but I agree that they're more work. You have to not be shy about repotting or playing "swap the plant" when one thing outgrows another. I do always think of what plants will be compatible before I pot them together. Light and water and such. Fine Gardening Magazine had an issue called "Container Gardening" during the summer that had some absolutely beautiful combos. We are moving soon and I can't wait to try some of their ideas. If you can find a copy, it's pretty inspiring. They have a combo pot with a pink princess philo that's first on my "to do" list.
I'll have to try the aloe thing the next time I have an ailing plant!