Ok - my experiences over the years....
-Nasty habit of not idling properly after a while. fix : entertaining use of a paperclip as a coil-spring on the throttle-body.
-Sparks of flame ! Every 100,000km's (50,000mls approx) replace them...a painful job....
-Death of internal electric motors
-Do NOT over-rev until toasty ! slipped cogs etc. My own experience is to wait for 15 mins until th entire engine is warm, the thermo says that temp is approx 40 deg C. The you can wring its nuts off....but not before !
Having just recovered from the dreaded water pump issue, here's my 2c worth:
-Replace the pump and belts ! Bosch (thank the Good Lord) actually make both Cam-belt and V-belt, so do both. Saves time. All up NZ$ 600 = US$300 = GBP 150 approx. Once done - the engine nothing but growl, and displays not other nasty habits or dreadful noises
-Do the brakes. I did....totally worth it SO pricey. should be done once every 15 years or so, so over time its very cheap, but not at the the time ! watch out for squeel - judicious i.e. ludicrously dripping use of brake cleaner is recommended.
- If you have a cloverleaf QV, apparently they all have a nose-down squat - if you feel paranoid about this, get new springs - I an working on this at the moment, don't know how bad this is going to be for me, and I may be needlessly paranoid
Aside from this.....treat the Alfa with care, grease the points every 6 months, and not much else tends to go overly wrong. I keep my baby in a garage, clean it, grease it with a teaspoon, and spot probs as often as possible.
re the dash lights in a 24V - this is hilarious - simply tap the dashboard ! it tends to bring them back from the dead.