I missed Ian McKellen in Waiting for Godot when I was in Oxford and it was playing in the West End, and then I missed it when I was living in Hell's Kitchen and it was playing on Broadway, and then I got to Cape Town and it was playing at the Fugard, and I went last night and got a student ticket in the third row for $20. (Sometimes, being terrible at life is just being awesome at life in disguise.)
If you're in Cape Town, you should definitely see it - it's a good production, and the Fugard is beautiful. At the end, Ian McKellen was really close to the front row bowing, looking pretty much directly at me, and I was like, oh my God, I'm staring directly into the face of Magneto. When I was six, this totally would have made me wet my pants.