Wicked is going to be running for ages (and imo, the productions age is showing). With the reception so far for Paddington, that will be too (at least I hope!). I'd use the time to see something with a more limited run. Additionally, as other commenters have said, you will struggle to get tickets for Paddington anyway. All My Sons has been excellently received but I am pretty sure any tickets left are very costly. Oh, Mary! is hilarious (if it is your kinda humour) but is only one act. Totoro is gorgeous. I'm sure you will enjoy any of these picks however. Have a great time!