After driving the Civic for 1500+ kms (50% city + 50% highway), I'm finally ready for a proper review of the car.
COLD Rush Hour Traffic Driveability: Words cannot describe how poor the Honda Civic is in stop-go-stop-go rush hour traffic. I'm embarrassed to admit that I have stalled the Civic atleast 2 to 3 times. I've almost never stalled my old Optra 1.8 in 6 years - it was frankly brilliant in stop-go traffic. The low end torque of the Honda Civic is truly appalling.
Only 5% of my driving is in rush hour traffic - so I don't pull out my hair too often when I'm in the Civic. But if you are planning to buy Honda Civic manual and if most of your commute will be in stop-go-stop-go traffic, well, good luck baldy!
LUKEWARM:
Ground Clearance: All that reports about Honda Civic scraping the underbody on road humps is really blown out of proportion. Yes, I have scraped the underbody on "Nelamangala Tumkur Road" humps - but its because of poor design of the road humps on that road. My old Optra, my brother's Alto scrapes there too - even a Tata Indica.
However, all those reports and the scraping experience has freaked me out and I drive real slow on road humps. "Phew" comes out whenever I corss a largish road hump.
City Driveability: Since I'm quite used to Optra 1.8's city driveability, I initially found Civic to be "underpowered". But after a few kms, I learnt how to drive the Civic in the city - in a gear lower than what you would in a normal car. Basically, if the car speed is below 10 km/hr (like when crossing a road hump or making a turn), one has to shift to the first gear.
Since gear shifting is a joy in the Civic, this is one compromise I love to make. Unless you are in stop-go rush hour traffic, driving the Civic inside a city is a joy - but you need to be ready to shift gears.
Music System: Honda Civic's stock 6 speaker music system is just about average. My old Optra 1.8 LT's 8 speaker music system was a lot better in clarity & bass reproduction. Plus, Honda Civic does not have steering mounted audio controls.
However, the volume button is quite large and easily "falls" in my hand - so I don't miss audio controls on steering wheel much. Also, the music quality is not exactly terrible - the sound quality will suit 90% of car owners, including me. So I don't plan to change the music system as of now.
Driver Seat Comfort: The driver seat is extremely comfortable, but unfortunately, the seat is made of slightly softer materials than what I like. Basically, it is good enough for 3 hour highway drives, but after that, your bum starts hurting. You have to take a break after 3 hours.
Optra 1.8's seat was a little firmer, and even a 4 - 5 hour continuous drive would still keep my bum happy.
Ride Quality: The Honda Civic's ride quality at slow speeds is just about average. Optra, Punto & even the Alto does a lot better. However, Civic's ride quality is good at higher speeds on the highways - you don't have to slow down on bad stretches.
HOT:
Looks: Blah blah blah, yada yada yada. And I'm beginning to like the colour too.
The rear looks a bit fussy, but I have enhanced the look with a Team-BHP sticker.
Interiors: More blah blah blah - you have already heard this before. I discovered that the dash too is made of soft touch plastics, just like the door plastics. Nice place to be in, overall.
Back Seat Comfort: I tested the backseat comfort of the Honda Civic for around 120 km. Now I understand Honda's logic of providing music system controls at the back. Neat touch. The backseat is surprisingly roomy & comfortable even for a 6 footer like me.
Because of the large glass area, visibility is top class from the back seat. By the way, I finally found a good place for Lord Ganesha on the curvy dashboard

Auto AC: The airconditioner is super-powerful and throws out the hot air inside a parked car within 60 seconds. I set the Auto AC to 25 degrees and I've noticed that my fuel efficiency is oddly improving. The compressor almost shuts off when its cloudy outside, saving fuel.
Rev Happy Engine: I have never crossed 4000 RPM in the Optra 1.8, because it sounds so rough and there is not much acceleration after that. But the Civic - its another story. Oh boy, what a sound and what acceleration.
Tyres: My Yokohama A-drive 205/65 R15 is extremely grippy, even on wet winding roads. Although I was pushing the car a little bit more at every hairpin, I couldn't get the tyres to "squeal" and lose grip. Will try to push harder the next time! However, the Yokohama A-drives are slightly noisier on the highway.
Fuel Efficiency: I got only 8.2 kmpl in the city on my first full tank. But as I changed my driving style to suit the Civic, I got 9.3 kmpl (with AC on). But after I discovered Auto AC 25 degrees feature, I think I might get close to 10 kmpl this time
On the highway, I got close to 15 kmpl on a full tank. My driving style was - AC off 80% of the time, did not cross 100 kmph, cruising speed of 75 kmph and gear changes mostly at 2000 RPM but never crossing 3000 RPM.
SUPER HOT:
Highway Driveability: High speed stability is excellent. The fourth gear is a devastating tool on winding roads. It pulls from 40 kmph like a train in the 4th gear. You don't need to downshift unless its a hairpin turn.
Driving Pleasure: I'm beginning to wonder if any other car could be any better than the Honda Civic. The steering feels heavy at all speeds and the feedback from the steering wheel is excellent. City & highway driving is a joy just because of the way the steering feels. The short throw gearshift makes a lovely mild "thunk" sound everytime you shift. And the positioning of the gearshift is perfect too - falls perfectly in hand with the arm rest supporting my arm.
CONCLUSION:
Honda Civic - Unbelievably terrible in rush hour traffic, pretty good in city and unbelievably brilliant on highways & winding ghat roads.