The first time? Or the second time?

The first time was when I was a pre-teen... probably 9 or 10. My dad needed some stuff from Radio Shack to hook up our new Sony BetaMax deck O0, and while he was figuring all that out I wandered into the part of the store with all of the small components - and was fascinated by it. I had no idea what any of it did. And then I spotted a bunch of these little books... written on graph paper. They were only a few dollars each, so I talked my dad into buying them for me (it was all of the classic Mims notebooks that were so awesome for their time). My dad happened to work as a clerk at a small electricians supply company, so within a few weeks I had a soldering iron, multimeter, a handful of discrete parts, a breadboard, and an unstoppable desire to strip down any and every piece of electronic equipment I could get my hands on - just to figure out how it worked. Not all of it was broken before I got my hands on it - but afterwards it sure as hell was! Every week he would bring home some new parts for me to tinker with. Usually mains-voltage stuff, but sometimes it was low-voltage parts too. Pretty much whatever surplus gear happened to show up at his workplace.
But by the time I reached high school, "being cool" was more important and I forgot all about the electronics stuff. I went to college for a few years and eventually made a cozy career in software engineering / consulting. I've been doing that for almost the past 20 years.
The second time was when I started to frequent Kickstarter, which I joined to sign up for a cool video game I had heard about. And I kept seeing all these projects related to "arduino this" and "arduino that" and "digispark" and "tinyduino" and "netduino". And eventually I got curious enough to go find out what they heck these people were talking about... and then realized just how far DIY electronics had come since my days of struggling to get a 555 timer circuit working to drive a piezo speaker. It was shocking to me. You could effectively get an entire computer (well, a microcontroller) in this tiny hackable form factor - and you could wire up your own hardware to it! Even just driving an LED with software was impressive to me... I was hooked and it wasn't long (days) before I had started building back up a serious workbench and was doing little soldering practice projects and learning everything I could again about circuit theory and all the various semiconductor parts. Of course this time I could actually afford to buy real equipment like a bench PSU, scope, DMM, hot air station, a good iron, vise and magnifier arm, and whatever other tools I needed.
That was late last year and I haven't slowed down at all. I've tinkered with direct AVR programming, taught myself several PCB and schematic packages, designed and fabricated small PCB projects, and built a bunch of micro-robots. Now I am getting my hands dirty with repair work - attempting to fix our very expensive home sound system which has 3 out of 6 channels blown. Salvaging it will save a good $700 or more. And I am also getting into FPGA design... something of a natural fit for me as it sits in between hardware and software.
Very happy to have rediscovered my childhood hobby.