The plays of Oscar Wilde sum up, even moreso than The Picture of Dorian Gray, all his flaws and talents and his propensity for playing the role of Oscar Wilde. If you're new to his world, I can't recommend a better introduction than the Oxford World's Classics edition of five of his most important plays.
"Lady Windermere's Fan" is an engaging start, high quality (excepting some rather awkward soliloquies), artificial and with a complex antagonist in Mrs. Erlynne. Lady Windermere evolves as a character, the pacing is well set and everyone walks away with one illusion...except Mrs. Erlynne. It walks the line between comedy and drama, and serves as a most enjoyable start.
"Salome" is atypical of the set, an aethetic work of art for art's sake. It's a heavy drama in one act, with overwrought, yet strangely believable phrases. I had to play "spot John the Baptist" for a while, not realizing that he was referred to as Iokanaan. It's a mood piece, weaving a fabulous spell, full of rapturous descriptions of jewels and wealth, dark imagery and a fantastically macabre climax.
"A Woman of No Importance" is the worst of the set. Dandy as VILLIAN was a bit strained, but alright. The real problems came from A: recycling witticisms. Some of the best lines in this play were also copied verbatim in The Picture of Dorian Gray, completely jarring me out of the story. B: the melodrama. Standards of melodrama are utilized shamelessly; the finale is a great mess of characters weeping at each others feet, lots of "I am not worthy of this and thats" abound, and I didn't care one jot about anyone. C: Hester, our heroine, was nauseatingly Puritanical. Unlike Lasy Windermere and Lady Chiltern, she never evolves, never learns to see the shades of gray in sin and morality.
"An Ideal Husband" is easily my favorite. A ripping good yarn, full of hero (or husband) worship, blackmail, a Wodehouseian butler, a perfect pace, and the marvelously endearing dandy Lord Goring. Most of the dandies Wilde created wind up rather unappealing in the long run, so meeting a complete charmer was a treat. It also manages to be romantic, albeit frivolously so, and is a perfect blend of comedy and drama.
"The Importance of Being Earnest" really didn't do it for me. Highly ridiculous, with completely unbelievable characters and dialogue. His most artificial work (and coming from Oscar, that is saying something!) It was alright, of course, but the dramatic edge was removed and all the scuffles over food look far better on stage or screen.
Despite the flaws in all these plays, and in pretty much anything Oscar Wilde set his name to, reading this set was so heartily enjoyable that it caused me to pick up The Complete Oscar Wilde. The Oxford World's Classics contains expansive notes, always readable, if not always terribly relevant. A good edition that I fully recommend.