Mine were totally different!
1st - DS, very bad morning sickness, didn't show until 6 months, with abusive XDP.
2nd - Twins!, huge from day 1, no sickness but heartburn like drinking petrol! - with my lovely DH.
3rd - now 27 weeks, it's a DD (have 3 sons and 2 stepsons!), no sickness, no heartburn, and know it's my last 
So each time has been like a first as had the 1st, then twins so again different and now a girl, only 1 in 6 children!! Families reactions have all been the same to each, again maybe because the circumstances of each PG have been different.
Certainly with regards to looking after them the first was different.