PC, mainly. I had an Atari 2600 and an NES too, but I was on the family PC most of the time. A few years later I got my own PC and it was all downhill from there.
PC, some of my earliest memories are of playing Pole Position and Digger (a Dig Dug clone) on my dad's 286, a couple of years later I was introduced to the NES and Probotector (the censored European version of Contra) by a neighbor. What I feel was the point where I really started getting obsessed with the medium was with Wing Commander, which blew my mind back then, with all it's well animated cutscenes, dynamic music and relatively deep story, especially as I hadn't seen Battlestar Galactica or much of Star Trek at the time, and my primary contact with Star Wars had been through one of those read-along-cassette tapes. Seeing large scale space combat unfold in real time, fully interactive on the computer monitor was quite a bit more enchanting than watching those pictures in the Star Wars booklet.
(click the above image for animation!!!)
The family owned a Pong box and a woody 2600, and those were well and good, but my first system that I begged and pleaded for and got for my birthday was a Sega Master System. Alex Kidd, Phantasy Star, Fantasy Zone, Space Harrier... Sega had some fucked up and imo more interesting IPs back in the day. I have a stack of EGM, Gamepro and VideoGames and Computer Entertainment magazines somewhere in a box in an attic.
That's kind of difficult for me to gauge because it was a gradual process for me, but I wouldn't have known about release dates, reviews, and that kind of thing until some time in the Gamecube era. I definitely had a big interest in video games before that though, I spent a lot of time on the Playstation One and Gameboy Colour.
I had a NES at a very early age. Moved on to the Genesis after that. That was the first time I can remember reading gaming magazines and learning about what was coming out. But I would have to say that it was the Playstation that solidified me as a true gamer. Bushido Blade had me hooked.
For me it was the NES. Even though I was born in 1990 my dads friend got his kid a Super Nintendo in 1994, then I got that kids NES and all his games. So I started a generation behind and never actually owned a SNES even to this day. But it was system that got me totally hooked on videogames.
My dad likes to make jokes like if he never brought home that console home I'd be way into sports and gettin' drunk.
The same as the first one I ever owned, the SNES.
I didn't follow any kind of upcoming games or news until the year GTA San Andreas came out and I received my first issue of PSM (it was the GTA one that had all the cheat codes).
I didn't start following websites until this gen.
The PC definitely got me hooked on gaming. I owned a Gameboy Advanced beforehand, but never got super deep into any games on the platform (besides Pokemon Fire Red). My first couple of games were Star Wars: Jedi Knight Jedi Academy and Lego Star Wars. I remember playing a shit ton of 2 player Lego Star Wars on a single keyboard. It was fun, if incredibly clunky.