This may be slightly ambiguous but here goes anyway

do you think that when deciding on a domain name (or business name  I guess?) or I suppose any name that people will search for Do you put any 's ie do you make it plural?

so if you were selling services say car services would you register the domain carservice or carservices ?
selling lawn mowers lawnmower or lawnmowers?

This is important stuff people!

Its not uncommon to find a domain you want registered only to find that the plural version is not

I appreciate there can be a lot of other factors that affect your decision but I thought I would ask anyway

go for it...