For myself, the A2A Accusim B17 pulled me to FSX. Otherwise I probably would still be with FS9/GW3. I like the vintage stuff. Mainly the bigger DC3, Twin Beech, Ford Trimotor kind of aircraft. But the one thing lacking was the realism, and A2A provided that. After awhile I picked up A2A's P40, for something different, never had an interest in fighters before, and have enjoyed the faster speeds with it. Same with the 172. Never had an interest in modern GA, but the realism makes it interesting. For scenery, nothing compares to GW3 for a vintage world, I keep FSX mostly default.