If you like movies like
300, Gladiator, Braveheart which have EPIC BATTLE scenes.... you are gonna LOVE Game of Thrones.
Every season, the large-scale battles get more & more EPIC... as the stakes get higher & higher, for everyone involved.
Season 1 is actually the slowest season, in terms of pacing... but the climax is usually episode 9... and it always finishes with a BANG in episode 10.
Also, one of the best things about the show is seeing the deep 'character progression' over several years.

The Stark Kids grow up right in front of your eyes. By the time you reach season 7... they are definitely NOT the same kids from season 1.