Thanks for the insight. I agree a PD who is not as fluent as others is difficult for a lot of us. For me, if I can't see their lips, I may only get a few words, not PD's fault entirely, but they are touted as being fluent in English. This goes for the local guides, too. We had a beautiful lady, well versed in history in Vienna once, who spoke in such low tones, no Whispers to have, and so the only ones who heard her were the ones directly in front of her. Of course, me being 4'10, had to stand behind a 6.2 guy or guys. A good PD is also a good organizer and leader to keep we seniors on our toes. Have had mostly great PD's.
Been on 5 river cruises and no small ship cruise. Never had lunch or dinner on the sun deck with GCT. Uniworld had a BBQ on deck which was our first river cruise. It was fun, especially since we never eat "al fresco" because we don't like flies or other bugs or birds. At sea there are little to none of these. So, that was a nice evening, but we never experienced it on a GCT river cruise.