I was 15 years old when started playing Squad Leader ( not ASL till several years later ). We play only once in a while now, perhaps 2-3 short games per year, but ASL, ETO, is 100% sure my favourite wargame. There are others great games in my hearth, like Fighting Wings, War in the Pacific or Vietnam 1965-1975 ( Victory Games ). But ASL is number one.
Red Barricades, A bridge too far or Kampfgruppe Peiper are part of my life, played so intense over long periods of time. Now we play much simpler games, but ASL is....wow.
Starter Kits are only a fraction of the experiencia, and the short, training scenarios far from memorable, but you can find ASLSK 1 for only 20 euros, good starting point.