Similar here, although even without the keyboard I tend to surf the web, read email etc. in landscape mode. I generally only use portrait mode when I'm reading an eBook (for which I always remove the keyboard and use portrait mode) or for some web sites, or even specific articles, that I think work better that way around. Probably that's just pre-conditioning on my part and that of web site designers; we're still used to the landscape orientation of desktop monitor being the norm, even though some recent web stats imply that most browsing for some sites is now done via phones and tablets.