I grew up watching Wimbledon so that will always be the one most reassuringly familiar to me.
But I also like the USO (especially the night matches) and the AO (despite the inconvenient time difference).
Not so keen on the FO or clay tournaments in general.
Of the smaller tournaments, I like Indian Wells, Canada, Cincinnati and Queens. Monte Carlo is the only clay event I really like.
“Other than when Andy lost to Novak in 2011 he has always played the No.1 player in the world in the finals, those are difficult to win." (I. Lendl).