I love(d) RCT3. My computer has graphic limits (I have to have many of the graphic features turned off - background mountains, clouds, etc - and my coasters disappear when i move the camera too far away ) so I get frustrated with that but at least I can do stuff with it.
I would love to see a No Limits - styled version as far as the track options go.
The online idea is a great one.
I would like to build bigger parks (I don't know how some of you manage) and an online directory of "theme packs", new and old.
Mostly, I hope I can afford the computer upgrades (or a whole new computer) so I can play the next one, when and if it is made.
Video games are budget-busting wonders that make you scream when you remember that you still have to make that mortgage payment (as are computers).