In the world all alone...

i would find a ball and call it willson it would be my best freind ::)

as much as you'd THINK its teh perfect life you would ultimately go insane without social contact.

To think into this question, it would be ruined. Eventually food will expire, you wouldn't have electricity, or water. You'd have to fend for yourself. Come winter you'd be cold and miserable. In the summer you wouldn't have AC and would sweat constantly.

Where's the fun in being the last person alive? Then again it would be amazing to have some time to myself for a day. But after a day, it becomes boring.

I would go to zoo and set all of the animals free! And watch them turn on each other! And eventually turn on me!

Masturbate.

Why is "try my best to contact someone" a choice if you're the only soul on earth? Sounds as little like an I AM LEGEND reference to me.

Perfect the cloning technique using my own DNA, the only problem is i don't have a uterus to implant the embryo in lol, dam the probably only time i would wish to be a women, actually a women could just locate a sperm bank and become preggers instead.

I would go completely insane and no doubt end up killing myself. Especially when it got cold.

Streak. No cops to stop me! WEEEEEEEEEEEEE!!!!!

I'd do all the drugs i can find and probably die from an overdose.

I'd probably just do whatever I wanted. Although I think I'd miss people too much, and go insane. XD

I definitely wouldn't commit suicide; I don't live for other people, so I'm sure I could struggle on without human contact.

I'd drive around in all the abandoned cars. I'd fire a gun or two. I'd look around all the abandoned houses. I'd go swimming a lot. I'd try and work out how to use generators to power stuff; see if I could get a games console and television working. I'd read. I'd write. I'd make a lot of music. If there were other animals, I'd raise and domesticate a wolf or two and we'd go round being badasses for all the people to see (just me).

get myself preg from a sperm bank and have a load of kids from different samples. they'd start the new human race...sadly they'd have to marry their half-sibs (eww), but this an apocalyptic situation we're talking abt here. actually I might try to find an egg bank too, maybe I could make test tube kids so that they'd have unrelated ppl to marry...

Can my dog come?

is this considering all the modern things >?
like mansions , hotels , casinos??

I would search for other people that may be alive and if I found them, I'd kill them.

become the leader of a pack of wild dogs.

It would be extremely lonely, you'd probably die of loneliness.

OMG the possibilities are endless! first ill break into a Ford GT (yes i know someone who owns one :D), then raid the supermarket for some supplies. then ill drive to Melbourne doing whatever speed i like, then go to a sex shop to pleasure myself, then look for a good mansion to live in.
It all probably wont last long because food supplies will eventually run out and there will be no one to hang out with.

I would explore the city in a SUV with my dog, and would carry an assault rifle just in case i find some really ugly human-shaped monsters...

I'll assume I don't know for sure that I'm the only living person.

I guess I would find a major radio station and broadcast a message through it, if anyone hears the broadcast they can meet at said radio station. Sort of like the guy in I Am Legend does.

However the most important thing would be to survive, find some decent shelter or a house near said radio centre, and think of ways to stay self-sufficient in the days to come.

I'm not a very social person as far as humans go, but being totally alone everyday would surely drive me to desperation at some level.

The idea of a post-apocalypse reality for example has always interested me a lot, and seems quite nice in some ways. The bad far outweighs the good, though.

I would have lots of pets, become self-sufficient for food etc, and raid the nearest sex shop for toys and the supermarket for a life times worth of batteries.

I would just have lots of fun :) Watch all movies, play every game... At least as long as I have electricity.

Minecraft

wait for death

set a trip wire so i can sleep in case of shuffling zombies