Hilly, short, technical courses with lots of turns. On those courses its easy for one guy to get away and lap the field because drafting doesn't help that much, its bike handling in the corners and short uphill sprints that let you get away. Flat, long square courses are the worst.
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Il faut de l'audace, encore de l'audace, toujours de l'audace
1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1