I used to drive an MG ZS180 and one of the things the MG community always says is the cars have character, I'm sure it's the same with Alfa. But so far I've never found the IS200 boring or soul-less, it seems to have character of it's own. It's a classy ride and the interior styling is quirky and interesting in my opinion. The exterior styling is also brilliant for a 10 year old design.
From changing to the IS200 I found it an excellent quality car, and it always feels solid and dependable. It's very smooth and comfortable to drive, and is just about quick enough to be fun to drive.
However, IMO rear wheel drive is not the massive difference I expected. Probably because I came from a car with a very well sorted chassis, practically no understeer or torque steer. But you can look on the IS200 as a great starter car for RWD, it's not got enough power to really show off the RWD advantage, but it's a good stepping stone to another RWD with a lot more power.