Spruce because it looks good with practically everything. It looks good with every wood except acacia but acacia is special in its own way 
. It looks good with stone & stone variants, it looks good with quartz, it looks good with clay & stained clay, it looks good with bricks, it just is a nice hue & shade that goes well with so many other blocks
. It looks good with stone & stone variants, it looks good with quartz, it looks good with clay & stained clay, it looks good with bricks, it just is a nice hue & shade that goes well with so many other blocks