Dark Skies is a movie about a family being visited by aliens interested in abducting their son. As alien films go it is actually pretty good - even better than Signs - which was an awesome movie all by itself.
So if you loved Signs, yes, you will probably love "Dark Skies" too.
I give it 4 stars out of 5.
Definitely a good film to watch with a girlfriend / boyfriend so you can grab them during all the scary bits.