I too have a bunch of Aloe, many which I am having a hard time identifying. Having cruised through many of the local Los Angeles arboretums, it is becoming obvious that even the experts aren't sure what many species are called- many are simply called 'sp.', and many have a variety of names.. and many are obviously incorrectly named. Though I will probably be no help, does this plant have a stalk, as it appears in the photo, and has it had any suckers. If not, it sure is more likely to be a 'tree aloe' making the list of possibilities a lot smaller.
Sorry I get in as I am not an expert on plant names. This aloe looks exactly like the one I bought which is Aloe Vera. I juice pieces of it and use on the scratches and cuts. It multiplies like crazy, have it for years.