Top-down art styles

I've always been a big fan of the 'standard top down videogame' perspective that HLD/Crawl imitate, which was a pretty common look for snes era games. Basically just a 2/3rds front on angle, with the sprites skewed a bit closer to front view. Super consistent, reads well (since it distinguishes the sprites and anything else that might be moving around the scene at sub-pixel distances from the bg) and easy to produce art for. Lining up all your shapes on straight horizontal/vertical lines lets you use your pixel res more effectively, too.