I live in the Piedmont of NC so I have rolling hills the whole time. I dont have a smart phone so I am not sure of the elevation change.

I do know that the last 1-1.5 miles home are always uphill slightly and they really wear me out if there is a headwind (usually there is.)

Commute Through Middle Earth
 

My ride is totally flat. My challenge is really only wind. I ride pretty much a north/south course with strong north wind about a third of the time, and a HUGE south wind almost all of the rest of the time. But what I really wanted to comment on was Bent's quote : "If the earth were covered with 2/3s beer, I would buy bottled water" I would like to say that I would go sailing !

I live in East San Diego and my usual commute requires me to go towards San Carlos by Mission Trails and Lake Murray. For those not in San Diego, these areas are notoriously hilly, many rolling hills and "not-a-flat" flats, going towards San Carlos the hills slowly get steeper and steeper.
Personally I don't mind hills, I just spin at 100 RPM and barely break a sweat, unless I'm in a rush, and then I sprint up hills in a larger gear. I just hate the "flat" roads that seem flat but are actually slightly inclined. Spinning in a low gear is awkward because you're generating a lot of unnecessary torque but then shifting up loses a little too much torque and you'll be trudging along at 40 RPM.
I always map out new and unusual routes to make sure my Elevation Gain/Loss ratio stays very high.

Lots of small changes in incline, but mostly flat.

Not time-trialing it downtown or on the MUP, though. There are some low trafficked roads in good condition easily accessed at the end of the ump though, I'm fond of tacking extra miles on that way. I think I'm going to start a 5 mile sprint on one of them(there&back)every other day for fun.

Bike commuting in Okinawa, Japan is a combination of hills and flats. I am glad my Domane has a triple which makes the steep hill climbs a bit more comfortable.

My commute is only about 2 miles. Very flat. I kinda envy the people that have longer commutes. Once in a while I'll take a morning ride of 15 miles or so before work. Then shower there. It's still very flat. That's the California Central Valley for you.

As others on here can attest, some bikes just are not meant to go fast and are designed around functionality and utility vs speed. My ride generally cannot go fast, but it can climb like crazy.

This town has maybe 2 flat streets, and they are not flat out towards the bypass, it goes uphill. The bypass tends to be the highest point, which has both benefits and drawbacks.

- Andy

3.8 miles of downhill in the morning for me. i live in san diego and bike from north park on through south park, ending in barrio logan. almost all of it is downhill, except a .5mi long flat area. all uphill in the afternoon. I ride through a few nice neighborhoods, by a beautiful park, and if I want to bike through the golf course there is a beautiful view of the SD skyline.

The commute from home to downtown is just under 10 Km, with 270 meters ascent. It's okay, except for a particularly steep portion about 3 Km from home, which feels harder than it really is because one hasn't had time to warm up by then :)