What Are Some of the Best Telescopes That You've Used?

I've used a few for my research into growing supermassive black holes and observing their effects on galaxies. So you need a really big professional telescope to see some of these because they're really quite far away as well. The Isaac Newton telescope in the Palmer, CSO and the Keck telescopes at Mountive Care as well. And also the Shane 3 Meets Telescope at Lick Observatory in California just outside of San Francisco. It's essentially a telescope in what I can only describe as big yellow scaffolding. You have to walk through the dome where the telescope is while you're observing.