1. I was nine, I think. I was still in Primary School, so I can't have been any older than eleven...it was such a long time ago, and the 90s are one big blur for me, aha.
2. Thirteen.
3. Above average for someone of my age. I never used chatspeak, and had good spelling, grammar and punctuation drilled into me by my teachers. Plus I was a little precocious. Just a little.
4. I would hope quite a bit, since I was around nine years old and am now twenty-five. It'd be quite depressing if I hadn't changed at all during that time...although I expect my mother would say the only real difference is that I've gotten bigger and have a wider vocabulary with which to complain. xD
5. Oh god, I have so many. I remember dialup. I really wish I didn't, but I do. The screeching noises it made as it connected still haunt my dreams sometimes. You had to come off the internet if you wanted to use the phone, and that always used to annoy the hell out of me. Although I only had ten hours a week until I was about thirteen; then it got changed to four hours per day, and it wasn't until I circumvented it by using Internet Explorer instead of AOL that my mother finally got rid of the restriction.
I remember the very first forum I joined was the official Baten Kaitos one, which shut down around 2006 and scattered all of us; the only person I'm in contact with from there still is my closest friend. I remember the first RP forum, Legacy Forums (not the WOW one you'll find if you google that) that I joined when I was fourteen, and everyone else on it was in their thirties and knew each other IRL...I got a none-too-gentle crash course in roleplaying from the admin, who I met on another forum. I haven't spoken to him in ages, unfortunately.
I remember Janime, which was my first major forum, which I loved to pieces until the admin turned into a Nazi and everyone left. I grew up in that place, I think of all the forums I've been on that one shaped me the most. I remember the era of Invisionfree forums; my peers at Secondary School and I would all post on those after school, and a new one would pop up literally every week. I think my tendency for anonymity stems from that period, as I never wanted them to find out who I was.
I remember when Myspace and Livejournal were both really huge things, back before Facebook, Twitter, and Tumblr essentially ruined social media by turning it into a toxic warzone. Everyone had a Myspace, and I could never get mine to look the way I wanted it to! I still have access to my first LJ, which I made back in 2006...I am none too proud of the entries in it and very glad they're set to private, haha.
I've lost contact with so many of my friends online that it's actually quite painful to think about, and it's one of the main reasons I'm so reluctant to make new ones...a lot of them were central figures in my life whilst I was growing up, because I didn't have many friends IRL. I suppose that sounds very sad, but I got very attached to a lot of them, and I really wish we hadn't fallen out of contact. Most of my nostalgia is of moments when I met some of them, and the conversations we used to have. I really miss a lot of them still.