Model 3 will be a performance car
Elon Musk is a performance car guy. He cancelled the Model S40, not only because it had few takers, but apparently it also "sucked" in his words, with low available peak power from fewer batteries. (source purely from memory)
If at all possible at the proposed price point, the Model 3 is going to be performance oriented. It is supposed to be aimed at the BMW 3-series, with a probable performance dual motor version aimed at BMW M3, Audi S4 quattro and Mercedes AMG C63.
Many of the renders in this thread are at minimum a class below, what the model 3 will have to be, to sell at a minimum $35 000 price point (minus tax credits, etc.). Tesla might develop such a car in the future, when battery prices have further decreased, on a Gerneration IV platform, but probably only after a pickup truck, a new roadster and possible other not-ultra-low margin vehicles.
Tesla Model S is very well balanced, with a very low center of gravity, both due its skateboard platform. Electric motors have very fast reaction times. Many people on this forum have remarked on the great, even exceptional handling of the rear wheel Tesla Roadster and Model S on winter roads and in snow. There is a guy in Norway, who approved of the Roadster handling in snow enough, he bought 14 (!) [Edit: (only) 6] Roadsters for his village.
Considering that a dual motor version is probable, both a rear and front wheel drive model would be possible. However, considering the story so far and a possible California wheather bias, I expect Model 3 to be rear and all wheel drive only.
I am a great fan of shooting brake cars, but the sloping aerodynamically optimised hatch of the Model S does create a pretty big trunk, too. I expect the Model 3 hatch to be similar in form and aerodynamic function, if a little steeper to give enough headroom for the back seats in the 20% smaller, i.e. shorter Model 3.
Edit: Whoops, Sorry! No Idea, where I had the number of 14 Teslas from. Well, posting long ago memorised numbers without researching sources, is a little on the risky side.
Regarding the Tesla enthusiast in Norway who owns multiple Roadsters, he does not own 14 as you stated, but 6, and one Model S. See
A Tesla Superowner in the Arctic Circle | Tesla Motors