I've had a facebook account for over 5 years, and its basically just a part of life for me. I have access with my smart phone so I am constantly up with whats going on with the people around me. I m friends with people that i work with so its sometimes good to get in touch with them as they seem to check their facebook more often than their emails :D
I like it probably because you can connect with people whenever and with minimal effort. sounds slack, but can i justify it by saying life is getting busier now days? i think im also just lazy.
I read that people from my generation consider themselves multitaskers, with importance on time efficiency. and i guess this is also explanative of why facebook has its relevance.
Its also cost effective sometimes, saves me having to call or text people, if i just log in and use facebook chat or messaging.
Some people may consider all these things negative, in that there is no real in-depth connection with people, or that you end up friends with people on facebook that you dont even like in real life. But i just think its convenient. and its there, and i use it. i dont even think about it anymore.
i ve also been on Myspace for a longer period of time, but i havent accessed it in 2 years - not so many of my friends are members and it seems to have a completely different appeal - its more music/entertainment orientated now days. doesnt appeal to me.