The main melody is simple, memorable, and often played with a gentle, staccato feel (pizzicato strings) that highlights the "toy-like" or "dollhouse" nature of the game.
It starts softly and builds into a fuller, more joyous orchestral swell, representing the beginning of a new, vibrant life for the Sims. the_sims_4_soundtrack_main_theme
Unlike the almost majestic feel of The Sims 2 or the driving, slightly more optimistic pop-feel of The Sims 3 main theme, the 4th installment focuses more on a classic, almost cinematic orchestral soundscape that feels more relaxed and intimate. The main melody is simple, memorable, and often