Alpha was beautifully drawn in the pilot story and most of the early stories.... and while I do like the way Ashinano drew her in the later years, she's incredibly gorgeous and handsome (in a womanly way) in the early stories, something that Ashinano lost later on.
Alpha also showed a sense of humor with Ojisan that she also lost later on. I think Alpha is over all one of the greatest manga characters ever, tho I dare say she was at her prime, her best within the first two dozen stories.
Think of how cool Alpha looked the first time she rides to Yokohama for coffee beans.
Then look at her in the conclusion of the series. She was still cute but the cool factor of the pilot story was gone.... Story 139, where Alpha flung her camera around to take some wicked cool shots, should have been the concluding chapter.