I do a lot of research on both the first and second World War, bit of a hobby of mines. I've visted a few of the battlefields in France and Belgium (Normandy (all beaches; Gold, Sword, Utah, Juno, Omaha), Ypres (Passchendaele), The Somme and am planning on visiting more of these places, such as Arras, Mons, Bastogne, Diepe etc. etc. there's so many lol, once COVID subsides.
I'd say I'm probably actively more interesated in WW1, because after the Second Boer War the change in technology and types of warfare really developed and became in a way a bit more brutal, also the politics at the time leading up to WW1 are pretty interesting too, regarding the different Empires etc. Also how the lead up to WW2 was influenced by the conditions of the Treaty of Versaille etc.
I could literally sit here for ages typing shit haha so I'll stop here.