if you're the one with the 15", and the person near it's a 12" or 10", there's enough room. lots of people will be satisfied with 12" so if you're the 15" you'll be in the win. get a 12" if you want room in trains, probably. 14" is a weird compromise. you either need a proper office or table or you don't. and 17" will always be rare enough that 2 people with 17" landing on the same table will never happen. I mean, you get a 17" inch machine especially so you can beam a "fuck off, keep the distance" to people around you... :P
if you're the one with the 15", and the person near it's a 12" or 10", there's enough room. lots of people will be satisfied with 12" so if you're the 15" you'll be in the win. get a 12" if you want room in trains, probably. 14" is a weird compromise. you either need a proper office or table or you don't. and 17" will always be rare enough that 2 people with 17" landing on the same table will never happen. I mean, you get a 17" inch machine especially so you can beam a "fuck off, keep the distance" to people around you... :P