Man it is going to be hard to pick some after reading through this thread. It's impossible not to be influenced by what others have said. SO do i go for the games that i played early on that ultimately got me into gaming, or do i pick the games that have influenced me as a person, among millions of others? I'm not really sure. So here is a list of 5 games which i loved playing and spent hours on. They could probably be changed with many others but they are the ones that stand out in my mind right now.
1. Total Drivin' - This was a game i got bundled with my PS1. I was only 9 years old when i began playing playstation, although i had previously owned a Mega Drive and SNES where i learned that i would love gaming by playing Street Fighter, Streets of Rage, Mario and so many others. But Total Drivin really got me into racing games. I loved it.
2. Gran Turismo. Need i say more? Probably not but i will anyway. This game just hooked me by the mouth. There was so much to do and see. I will never forget the hundreds of hours spent just to buy that new car that i wanted. 2 played was the highlight for me having friends round showing off your garage and then smashing them on the track. Good times. Also of course GT2 GT3 and GT4. And TTC 1 & 2.
3. Grand Theft Auto - I still remember first playing the demo at a friends house and never having so much fun in my little life. All i had for months was the demo because i had to wait for my mum to buy it. What a game. Also would like to mention Driver here for the same reasons as others. It's a pig now but at the time it was revolutionary. The story was great. The cars were fun and the police could be brutal.
4. Age of Empires 1 and 2 - I spent alot of hours on these games when i was growing up. They had so much depth. My first online experience was with AoE2 and i loved it.
5. Combat Flight Simulator and ultimately IL2 series - Although my first Flight Sim was FS98 i have always been a lover of WW2 planes, probably even more so than cars. So as soon as i got a whiff of CFS i had to have it. I made my mum buy me a new PC so i could run it. I spent many hours completing the missions. It was buggy as hell but it was the best at the time. Until i discovered IL2. I still play il2 to this day and have spent more time on it than any other game. It is ww2 fan heaven. Probably over 800 hours online and more offline. I built myself a rig just to run il2 on full spec by spending all the wages from my first job when i was 16. It wasn't just the games contents either. Dont get me wrong the plane set is awesome and the maps are gorgeous. And i have never seen such great support and updates from any developers. Patches and updates are never far away. But what i loved the most was the friends i made online and the community feel. As Dragonistic experienced his fame in MC3, Il2 was where i achieved my fame. I was friends with everybody and would host my famous Co-op missions nightly. I had my own squad and had too many requests to join other squads. I had my own website and forums. Our own comms. It was great being so well known online. There was a great feeling when you teamed up with a few guys to pack hunt another flight. I also loved bombing missions, when little friends would fly with you to beat off attackers who thought your B25 was easy meat. There is just no other experience out there with a game that compares for me.
Honourable mentions -
Theme Hospital - i spent ALOT of time on this game and thought it was great even though i was very young.
Rollercoaster Tycoon 1/3 and Theme Park - Brilliantly fun games.
Tropico - I spent many hours finding out i couldnt run my own tropical island
But i did try and i loved every minute.
GTR1/2 - What can i say that you wont know?!
Tony Hawks - I skated in real life from the age of 10-20 and TH was there the whole time in one form or another.
Medal of honour and BiA series - Great WW2 games. Frontline was awesome, and so was Allied Assault. BiA Earned in Blood was so hard and realistic it was shocking.
European air war - i played this in between CFS and IL2 and loved it. Simulation physcis were revolutionary.
Sudden Strike - i recommend to everyone. It still isnt even really dated and the missions are brilliant.
NFS series in particular Hot Pursuit 2 - Another racing game that had me hooked for hours. I would love to play it now. Anyway i'm done i could go on listing forever.
MGS 1 - amazing.
Thanks for the nostalgic opportunity