Nothing wrong with being ballsy through the corners, so long as you know what you're doing. I was up in the Lake District the other week in my Focus (Mk2 Zetec, so probably a comparable experience) and that was pretty exciting at times. Only had one moment when I minorly cacked my pants because a 5 series loomed round a corner and took up all the room as I was approaching. Even then my ABS didn't kick in as I braked, so it was nothing excessive.
There is a lot to do with just knowing the car, like knowing how it steers, how it grips, how fast you can go round a corner. This is the kind of thing you need to learn from the bottom up, not the top down, though, which is obviously the mistake people want you to avoid. It's all well and good knowing you can take a corner at 50, but you want to find that out by finding that your car is getting close to giving up at 45, not by putting it into the hedge at 60 and working back down.
Sometimes it's just more about being pro-active (some would say aggressive) like taking a straighter line through the bends on the wrong side of the road, though obviously only when you can see 110% that it's clear, or just sticking in a lower gear when you're going uphill.