I'm primarily a Roman imperial collector, but I have in the last year, started delving into English hammered coinage, here's my two favorite English hammered coins in my collection.
Aethelred II
AR Penny
1009-1016 CE
London mint, Aethelric moneyer
Spink 1154
18.5mm, .88 grams
Henry VI
AR Groat
Calais mint
1422-1427 CE
27mm, 3.65 grams
Spink 1836