Oh man. Knives and flashlight talk on the same forum!! I always had d cell mag-lights, but in 2002, I bought my girlfriend (now wife) one of the first LED flashlight, a Lightwave 4000.
I soon discovered CPF and got a Surefire 6p. Fast forward 12 and the lumen wars have gone bonkers and the prices have come down. I have given all of the Chinese brands such as Zebralight, Nitecore, 4'Sevens and olight a shot, but have officially given up on all of them. In my experience, they have not proven reliable enough for my needs and the service / warranty is horrible.
I have stuck to mostly Surefire, Malkoff's and a few Streamlights, due to overall quality, reliability and in rare instances, phenomenal warranty.
I have also realized that 500 lumens is usually enough for most applications and waaay to much for normal EDC stuff. However, that doesn't keep my from hanging a Surefire Titan Plus from my keys LOL.
The last 10 years have been astounding for the LED industry, I can only imagine what the next 10 will bring!!!