No real issues with the petrols I think - some small issues that you may wanna look out for though - none are deal breakers but they may total up to a few tenners if you need to get them fixed:
* If it has white dials be prepared to never know how fast you are going (they are difficult to read under most light).
* Check the lights behind the air conn panel are lit up at both sides - these lights are on regardless of whether the lights are on or not and hence the bulbs fail - doesnt bother most and they will probably fail anyway but FYI anyway.
* The clips on some of the wheel nut centre caps can snap and hence the covers come loose - give each one a few taps and make sure none are loose/about to fall off.
* Front badge - casing can crack from stone chips - check.
* Rear badge - boot button and will leak in water - check for pinky colour/discoloration.
* Look under the front of the car and see if the heat shield is loose - on my (diesel) they are very loose and close to the ground and can come apart if grounded out on speed bumps.
* Play a few CD's in the CD player - these can be temperamental - mine only plays some CD's.
* The washer fluid hose can leak on the join by the fuse box - open the bonnet and spray the rear (not the front jets or you'll make a mess) and check under the front left of the car for a puddle.
* Lift the carpet out of the boot and check under it to see if you have a toolkit/spare wheel/jack.
* Check for any peeling on the leather steering wheel/handbrake lever.
* Listen for any rattles immediately behind the instrument binnacle - a small but common issue is stuff coming loose behind there and flapping about.
* Misting up behind the rear light clusters - this is normal.
* The Bravo has cornering lights - the front fogs come on and off if under 40mph and you turn the wheel/indicate - it mystifies some people, particularly white van men.
* If on the test drive the steering feels too light there is a button to the left of the CD Player that adjusts it.
Only other thing is the only problems I've ever had have been drivetrain related (flywheel and driveshaft bearing) - I dont think the problems are as common in the petrol variants but listen as you accelerate for any nasty noises.
I will be honest I had a lot of issues with mine - mostly were just due to horrendous luck (2x windscreens and a mechanics wrench through two radiators by accident). Aside from the drivetrain stuff though its been pretty OK.
Oh, and welcome to The Bravo Room.