So name a block, and the top 5 most liked comments are what I will use
Spruce/Dark wood. This leads to logs, planks, chipped and other wood (possibly the leaves too) that you can use as a basis to create pretty nice places. Boats, ports, bridges, towers, cottages, bases, farms, fort walls, trees, mines, cave bases, etc.However, if you intend to make a house, then my choices range from wood of all types to quarts, stone or nether materials.
For me, I love to use wood, however, in survival, wood becomes a pain in the butt and so much so that I grow angry when I can't find a single sapling of the entire collection. I literally flew and broke two to four Elytra wings to find a jungle for three things: A sapling, Coco beans and a temple (for a base).