Planes

A220-100 — 8/10, very sporty, window in bathroom, a bit too much yawing (BOS-BNA, DEN-SLC, BOS-MCI)
A319 — 3/10, I hate this plane, way too much yawing, climb + engine sounds don't inspire confidence (SLC-JAC, JFK-JAC)
A320 — 6/10, good plane, nothing exciting though (BOS-DTW, LGW-BIO)
A321 — 7/10, more comfortable than the A320, still a bit dull (BOS-DEN, BOS-SLC)
A321neo — 8/10, very comfortable + quiet ride, good resistance to turbulence (BOS-LGW)
B717 — 6/10, overall not a great ride, +1 for T-tail and rear engines (BDL-DTW, SDF-ATL)
B737-832 — 7/10, did a steep climb in one of these so that was cool, overall it's ok (BOS-DFW)
B737-MAX — 7/10, nicer than I expected given its reputation, handled better than the 900ER (BDL-BNA)
B737-900ER — 6/10, similar comments to A320, +1 for being a classic, -1 for needing a 9800 ft takeoff run (BOS-PHX)
B757-200 — 7/10, fat wings, high power to weight ratio (BOS-LAX)
B777-200 — 7/10, +1 for being a heavy, -1 for poor resistance to turbulence (BOS-LHR, EWR-SFO)
B787-9 — 8/10, cool windows, smooth ride, could be bigger (PHL-LHR)
E175 — 7/10, nice small plane, 2+2 seating is neat (BOS-JFK, SFO-JAC, BOS-MCI)
E195 — 6/10, similar to the E175 though -1 for being stretched (JFK-DTW)

A380, any variant — big boi
B747, any variant — the queen of the skies!
A340-600 — I'd like to experience that extra long takeoff roll
A350-1000 — I've seen these at the gate and they look massive
PC-12 — beast of a plane, also iconic
DHC8-400 — turboprop + high wings, can't beat that in terms of unique experiences