I would respectfully suggest that the reason 80-90% of vehicles pull forward into their garage is that it is dangerous for ICE vehicles to sit in a garage backed in. When the car is started, carbon monoxide from the exhaust will gather at the rear of the vehicle rather than be exhausted out through the front of the garage into the air, particularly when a backed in ICE car is turned on to warm up. While people think carbon monoxide will simply dissipate once a garage door is opened, it actually will sit and linger. It really is quite dangerous. Obviously, with an electric vehicle, this danger vanishes in to the clean fresh air.
Regarding the to creep or not to creep, since I am getting delivery on Saturday (yay!), I can only speak from my test drive experience. While I could see myself getting used to it, driving my friend's Model 3, I found the absence of creep atypical. I say this as someone who has had two manual transmission ICE vehicles and two automatic transmission ICE vehicles (and an, obviously, manual transmission motorcycle).
Obviously, with automatic transmission, the familiarity is there. However, I did not find the creep off akin to my manual transmission experience either. In a manual transmission, the accelerator is not what determines the forward movement in 1st gear. It is the friction point balanced between the clutch and the accelerator. So I would control the amount of "creep" through a balance between the left foot (or left hand on a motorcycle) coming off the clutch and the right foot (or right hand on a motorcycle) pushing forward on the accelerator (or opening the throttle). With any new manual transmission, it would take a moment or two to find that friction point (and an embarrassing stall if I missed it), but once I found it, that's how I could control the creep.
I don't know what I will ultimately find most comfortable next week, but I would guess that I will ultimately like the creep on option. Time will tell...