This one’s hard, but I’ve gotta say PA. I loved Loomis so much when I visited, but I enjoy the larger student body and diversity at Andover.
Choate or Hill?
Choate because their dress code is more relaxed.
Milton or St. Andrew’s?
SAS, all boarding 
Lawrenceville or Mercersburg?
Lawrenceville. Beautiful campus and the unique house system. Plus, it’s five minutes from the town of Princeton, which is beautiful.
Lawrenceville.
The Hill School or Episcopal?
Probably the hill school just going off of a quick image search of the campus.
SPS or Hotchkiss?
Hotchkiss. I loved the atmosphere there.
Taft or SPS?
SPS, beautiful campus, no rivalry.
Choate or Taft?
The atmosphere at SPS is amazing. I also think that Taft has a very close community while Choate is more of a larger bs. In my opinion, Taft.
Hotchkiss or SPS?
Hotchkiss, love their arts program.
Exeter or Laurenceville?
Exeterrrrrrrr, gotta rep my school!!!
but Lawrenceville’s really cool, their house system is really unique.
Hill, or Lawrenceville? heheheh.
L’ville cause Hill is the only school that flat out rejected me lol. also i like the house system as you said.
Pomfret or Taft?
Taft because I love their campus.
Deerfield or Groton
Deerfield - no latin
Thacher or Cate?
Cate!! Their dorm rooms are to die for.
Peddie or Blair?
Blair! I just really like this school and the atmosphere, I have visited and definitely going to apply this year
Putney or Pomfret?
Pomfret, it seems less rural. Also CT > VT
MX or Loomis
MX because of their library.
Groton or Milton?
Groton because its not k-12
Belmont Hill or Governors Academy?
Belmont Hill
Lawrenceville or Peddie