Not sure I agree they can bite more than FWD - but they certainly bite differently...
Having had bikes and mainly rear wheel drive cars, I have to say I *much* prefer RWD, and would never want another FWD.
With FWD you have power or steering, rarely both
Where a FWD tends to straighten when you apply power in the bend, a RWD oversteers - ie the power helps you round the corner. If you power smoothly round the bend, you'll find it a more satisfying drive.
The Omega is a big barge of a thing, but handles very well for its size, with good balance, so it's actually takes a bit of effort to get it to break... but once it's started to break there's a lot of momentum helping it along. So gentle increase in the throttle through the bend, and gentle lifts - heavy boots will encourage it to break. As you get into the habit of backing off and straightening up the steering, you'll find it fairly easy to control.
Once you realise where the break is, and when it's coming you'll start hanging the back end out for a laugh on roundabouts
If you're trying for it not to happen at all, be a little more gentle with clutch and throttle
A skid pan day, or a track training day apart from being a brilliant laugh would give you a much better idea of where the limits and a safe place to practice.
You should try a TVR, or 911 though - half the weight and three times the power