Hey, yeah, read my description of the stretch from Puerto Madryn to Trelew here. I hated Ruta 3: no shoulders, major truck route, no scenery, no trees, strong westerly wind, small towns 100-200km apart. Note the first three photos on that page, and extrapolate that to imagine the scenery for something like 2000km from Bahia Blanca to Tolhuin where it finally becomes interesting again. It can be done of course, and if you think you might like that, go right ahead. Generally, the scenery in Patagonia is only interesting on the Chile side, and in Argentina but only near the Chile border. Good luck to you and let us know where your blog will be.