ME2 or GTA IV or Fallout 3.... help me out...

[kibebr]

WEL>> WELL>>> WEL>>>>>>

I am new to RPG/Action games like these... they are pretty diferent... and I am used to play Hal Life 2, Doom3, Dead Space, MGS4... they are pretty forward games...

Now I am playing Fallout 3... I AM IN LOVE with this game!!! So... I am about to finish the game without exploring everything and get ME2 (PC) ar GTA IV (PC)... I dunno what to do...

Explore more Fallout 3... or go on to GTA IV or ME2 ?

thanks and sorry about my english.