What you prefer? Big screen or Small one

Personally, I prefer medium size screen smartphone, since it is really hard to me to keep large screen smartphone in my pocket and I also can hardly use small screen mobile phone.

However, about two months ago I attended at a seminar on mobile phone technologies, the seminar was mainly on newly invented apps applied in medical sciences technologies along with mobile phones and an extra device simultaneously. I found there, only large screen smartphones are useful to select for the purpose of that scientific seminar, since many programs were demanded to download, therefore a large screen could be a potentially better choice. :)