I just realised I started home brewing in June 2007 so I've missed that 10 year milestone by a month
I brewed kits for a year then stumbled on "How to go from Extract to AG for < $10.00" on this forum, bought a voile curtain and made a boiler which let me jump from kits to new-fangled BIAB, learning from the info in those posts. It worked, I drank the beer and lived - result!
I still do BIAB for "one corny" brew lengths but as the voile is getting old I made myself a stainless mesh grain basket using a 30 litre Euro bucket and an Ikea splatter screen (how-to).
Best brewing decision: cornelius kegs
Worst brewing decision: experimenting keeping yeast in distilled water