3DS games in particular are very nice for someone with a need to stop playing at the drop of a hat, thanks to sleep mode.
Fantasy Life*, Animal Crossing: New Leaf, Story of Seasons, Harvest Moon: A New Beginning, Rune Factory 4*, Animal Crossing: Happy Home Designer, and Tomodachi Life are probably the most compatible with an avid player of The Sims (I'm one, too, and own and have played all of these games).
Disney Magical World* is also pretty ace if the target player likes app-type sim games and Disney. It has a ton of content/variety of content and is shockingly good, considering most people probably don't even know it exists. Style Savvy: Trendsetters might also be good, or New Style Botique & New Style Botique 2: Fashion Forward if you happen to be in an EU/AUS region.
*These games all have fairly basic action based combat, DMW is the easiest, Fantasy Life is a little harder, and Rune Factory 4 is the most difficult of the three. Unfortunately, these are the games with the best storytelling.