I have been on SecondLife on and off for a couple of years, I dont use it anymore however.
There are also free, open source alternatives to SL like OSGrid. There everything is free and you can set up your own servers and connect them to the grid.
This enables you possibility to have your own virtual isles and build there whatever you want.
The first half year of SL I have been addicted to it, I have been sick pretty badly and all I could do is lie in bed the whole day and just hope I somehow survive to the next day. During that period I have been in SecondLife for 15 hours a day.
I know what Earth is talking about, I know it all too well.
There are lots of people out there that want to have fun online while neglecting everything around them.
People that have virtual sex or even virtual relationships where real feelings are involved while neglecting their real life lovers, children and pets.
There is even a documentary about it, I forgot the name but it was possible to watch it online somewhere.
There are ofcourse lots of cool and positive aspects about it.
There were cross world art festivals in holland where things are half real life, half virtual, and everything gets mixed, projected, and real life into virtual enviroment.
There are also music festivals, virtual versions of burning man festival, lots of crazy art projects, live musical events where people stream live media into secondlife playing music from their homes or streaming from real life parties etc etc..
Secondlife is dead however... I would not recommend anyone go there unless you want hookers or shopping malls for clothing.
Almost all creativity died through the years somehow there.
Earth im sorry for you, really.
It is a sad thing how extremely emersed people sometimes can get into virtual environments.
I have also lost a good friend to an online game called AION.
He only games all day long and never calls or is interested anymore to meet up.
Before he played AION he didnt play online for a while becouse he had lost his ex girlfriend and his two boys to it.
He only sees his kids in the weekends now.
After that he stopped gaming for like 1 to 2 years and always wanted to do something.
Now its just gaming again...
I have been a hardcore gamer myself.
Have played almost all singleplayer games for the PC.
all the THIEF games, gta games, half life series, rpgs like deus ex, strategy games like stronghold, age of empires etc. etc. etc.
My problem is that I find computer games not immersive anymore.
Due to this its just not interesting anymore.
At some point the magic stops.