As above - much influenced by age of when watched etc and the decreasing interest in latter years: due to over-hype re England and the 'flying jizz' commentary re anything Brazilian - especially when more recently they've proved to be as filthy and cynical as all the other competitors - but often 'card-proof'.
My Kids also like watching but probably have more interest in the 'forecast predictor' competition we've done (and in the EC Finals) since they were all old enough so from about 2006 ish. Sad indictment on modern football perhaps, that you can surge up the 'table' with a run of picking 0-0 or 1-0s
We've also involved the missus in trying to have 'themed' food nights - i.e. try and get an evening meal based around dishes from a particular country who are in action that day - had some surprising 'hits' - Paraguay or Chile and a few nr disasters (Polish Dumplings !)
Got the lady in 'Pau Brasil' round the corner very interested when we went in to ask about trad. footy watching fodder.

Didn't like to own up to the personal views I hold about her team though.
Kids discovered something called 'Antartica' - sort of a
Samba version of Rubicon - god knows what's in it!
My interest was such that I believe I managed to VHS nearly every match @ the Finals from about 82 - 2006-ish - stopped doing that when VCRs had their day and as above the interest had waned somewhat.
So my personal faves were '74 & '82 - the two sides I held dear beforehand at each of these - did particularly well too.
At '74 I was enraptured by the Swedes - bunch of well-coached nobodies, who'd worked out what they were good at and stuck to a plan A (sound familiar?) ... was roughly equivalent to a 8-1-1 formation - with big Ralf Edstrom up front occasionally joined by a guy called Sandberg I think.
Rankles (but I am a sad cynical ol' git

) that whenever they show continual re-runs of the 'Cruyff-turn' and how wonderful the Dutch were - its never mentioned that they didn't actually win that game (was 0-0) and the Swedes hit the bar in injury time I think or certainly came close. Having said that the Dutch were breathless in the 2nd phase - especially vs the Argies (4-0) - and again vs Brazil?
Eventually the Swedes ran out of puff in the 2nd phase and on glue-pot pitches too - lost a game 2-4 to West Germany when they played completely out of character and went for it - led 1-0 for a few marvellous moments - and got it back to 2-2 after falling behind in a mad 3' spell after H/T. I think they eventually finished 3rd in the group - lost out to Poland - Lato/Deyna etc - were just too mobile for them.
In '82 I drew Italy in the sweep at work and got roundly mocked when they stank the place out in a group with Poland Cameroon and Peru. They qualified for the 2nd phase without winning ahead of Cameroon on 'Goals Scored' and were placed as an 'also ran' in the media's view - in a pot with Argentina and Brazil.
... and we know the rest courtesy of Mr Rossi.
The French played some great stuff in that tournemant too - and went on to be even better in the '84 EC (Platini, Giresse, Tigana & Fernandez.)