I don't know what would make Minmatar a poor choice for mining. The have a mining cruiser (Scythe) that gets the same bonus as the Osprey (and can load the same number of Miner II's). Granted, I've never seen anyone mining in a Tempest, but if you're that serious about mining, train up for an Apocalypse or a Mining Barge.
Edit: My character is Amarr, which I chose because it had the lowest possible Charisma. The bad part was that I started with a 7 base Perception. I also wanted to fly Amarr ships, because the weapons don't require any ammo (lasers)(bew bew). Lucky for me, I also think they look the best. You really can fly whatever race's ships whenever you want, though, as I also fly Minmatar, Caldari, and ORE barge.