My favourites are Jersey Boys, Guys and Dolls, Miss Saigon, Rocky Horror Show, Phantom, Chicago, Cabaret, Six.
I also loved Hamilton and Wicked, but glad I read up on the stories before I went otherwise I wouldn't have had a clue what was going on.
Shows I've seen this year and loved are Wizard of Oz (Craig Revel Horward played Miss Hannigan - brilliant};
Becoming Nancy (Birmingham Rep but not sure if its touring);
Aladdin - great tunes and the genie stole the show as in the film.
I'm not a fan of Blood Bros, or Les Mis. I found them both a little too depressing.
Saw an Officer and a Gentleman. It was a pleasant evening but the show was pretty forgettable and the main actors didnt have much by way of chemistry (imo)