First addictive game = Aces over Europe from Dynamix...absolutely LOVED that game, esp the campaign. I still think it had the best campaign structure for any WW2 air combat sim ie.
1. you chose what squadron you went to (which showed you the current a/c type, future upgrades and mission ie. mudmover, fighter jock, etc)
2. it allowed you to 'auto fly' to the target ie. you hit a button and it would proceed instantly ie. warp, but would stop when you got to a waypoint or came across enemy a/c, not require you to fly at 16x speed, etc.
3. the rank progression was pretty good..no making squadron leader in 3 months because you shot down 50 a/c during that time.
Absolutely loved it.