Your first time... How was it?

First memory of theatre was my big brother's school production of A Midsummer Night's Dream (he was Bottom, which at the age of 4 amused me enormously). They staged it in the open air, under the trees in the school grounds and I remember nothing of the play except the costumes.

For my 6th birthday/Christmas my best friend and I were taken to The Nutcracker in London - I remember the train, the taxi, the foyer but nothing of the ballet.

In my early teens, Pirates of Penzance and Romeo & Juliet at the Minack were the absolute highlights of a summer holiday to Cornwall. (Come to think of it, there was a fair bit of G&S scattered through my childhood, Mum loved it and passed that love on to me).

First West End show was Annie, at 17 - a ticket in the gods as I passed through London on my way home from two months in Europe before catching the late train home, arriving in Devon with the newspapers at 4am the next day.

Then I moved to London and a habit formed...

The first thing I ever saw on stage was a children's theatre production of... Pinocchio? Maybe. Or Snow White.

First professional show: Miss Saigon, Los Angeles 1995
First Broadway show: Les Miserables revival, 2007
First West End show: Jersey Boys, 2009

My first time was panto when I was about 4, Tony Blackburn and Ann Aston in Cinderella at a theatre in East Ham that is no doubt something else now.

Then a primary school trip to see The Plotters of Cabbage Patch Corner at Sadlers Wells.

My first Shakespeare was Twelfth Night, probably at Theatre Royal Stratford. I don't remember who was in the cast, only that Sebastian was hot and his scenes with Antonio had quite an effect on 15 year old me.

Also saw a pre ALW version of Phantom of the Opera around the same time.

I know I went to see 'Robinson Crusoe' as a smallish child but have zero memory of it except that I got a badge...

We didn't really do theatre when I was a kid (too poor...still am thanks to my theatre habit) so my first 'proper' theatre was as a teenager seeing Gillian Anderson in 'What the Night is For' ...nothing like a bit of adultery for a first trip to the theatre. However I was enchanted with the experience (and Roger Allam) and fell hard and fast. Despite listening to musicals from a young age the first musical I saw was The Boy From Oz on Broadway, and again it was all downhill from there...

First Professional show I saw was - Seven Brides for Seven Brothers at Swansea Grand
First West End Show I saw was - Les Miserables with Linzi Hately as Eponine
First Broadway Show I was was - Tarzan

I still remember each one vividly and the feelings that accompanied them.

I notice WOS have nicked the idea of this thread for their own website.

Cheeky buggers.

Perhaps we should start a "Confessions of a Box Office Manager" mini series like the one on WOS. Except ours could be interesting. And well written.  

My parents used to be avid theatre-goers who couldn't always find someone to babysit me and theatre used to be affordable enough to buy an extra ticket for a child who won't understand much, so I was lucky to get to see lots of both children and grown-up theatre. So there's a distinct possibility that neither of these shows that have stayed with me the longest were the first ones I ever saw, but I remember seeing a production of A Flea in Her Ear because I found it extremely funny without understanding anything that was going on (not that I understand what the heck is going on in that play to this day, but that's beside the point) and a children's production of The Snow Queen which has left me so traumatised for some reason that I still feel nervous when I enter the theatre I saw it in. 
My first London show was The 39 Steps at the Criterion because I liked the poster.

Shade! 

Terribly sorry to disappoint you! (I think??)

Sorry, meant as a compliment. I meant your writing is very good, mature than your age. Came out very wrong.

Early theatre - panto at Manchester or Liverpool (Ken Dodd & the Diddymen, Hope and Keen, Norman Wisdom)in early 1970s
Teens & early Twenties - 1st Shakespeare was Henry V at Bolton Octogon in 1979, 1st RSC was Hamlet(Michael Pennington)in 1981; Various summer shows in Blackpool(Les Dawson, Paul Daniels, Little & Large),Torquay (Get Some In!),Scarborough(Bud and Ches, and various plays at Plymouth theatre Royal in my student days 1987-1990.
Late Twenties onwards - RSC at the Barbican(various)1990-1994,ditto for the West End (I lived and worked in Romford at the time) then very little until 2008 when I started to get down to Stratford Upon Avon and London for various productions. I've also been to NYC and Boston,Mass. to see Victor Garber onstage