It all depends on what type of effects you are looking for and taste/smell.
sativas give a more cerebral high. indica more couch lock/body feel
sativas get big and need alot of room and flower a very long time. usually best for outdoors.
I would just research the described qualities of seeds and try some you like.
To fill more space you can LST, supercrop, Screen of green, FIM, or otherwise train them to take up more room in the flower chamber without getting too tall.
you could try Big Bud - White Widow - AK - or Northern Lights for some easy to grow good producing strains.
If you are looking for taste i would go with Papaya - a Diesel type (Sour Diesel - NYC Diesel) - Strawberry Cough - or a Haze/Blue variety