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just normal shoes. they're great for letting your feet do their own thing, you get less rubbing as the sweat isn't stuck between skin on the sides of your toes. i still get some blisters on long distances at the ends of my two smallest toes but they're never painful and I tend to only notice them when I bother to check my feet post-race and I use taping if its possibly going to be an issue.
Injinji. the toe bits take a little getting used to but they're great esp. over longer distances. some people say they're a little easy to wear through but all my many pairs are going strong still with no signs of that, reckon ill fitting shoes more likely to wear them out than the socks themselves.