The direction where my hand doesn't block the speaker.
If using landscape and if you have two hands I find it hard not to block the speaker in some way.
I just tried it and I guess you're right, but it does block it from time to time, just not as much the other way around.
to the right!
i wish there was a setting that i can turn off landscape mode such as texting or email, sometimes i like to use my iphone before i sleep and it annoys the heck out of me
Wow overwhelming majority are Righters! I'm a lefty myself as pointed out the speaker gets blocked otherwise.