oh yeah

indica - really heavy body stone, couch lock high ect ect. (don't quote me on this part, i may have them mixed up, but they also tend to be shorter plants with fatter fan leaves)

sativa - head high, gives you alot of energy (like i said, i may have them mixed up, taller stalkier plant, thinner fan leaves)

you should also note, atleast what i hear from here, it's really hard (if not damn near impossible) to get either pure, i.e. you'll either have bud that's primarily indica wtih some sativa in it, or vice versa)