Why watch any of these shows with for the most part, poorly written jokes, and celebrities who are obviously only there to schill their latest movie or whatever....when there's perfectly good soft core porn movies playing on Cinemax at the same time these shows are on?
i'm a bit of a late night junky.
each host has their own angle, each have their strengths and weaknesses (fallon is strong with music bits, kimmel and pranks, conan with experimental skits, leno does a bit of everything, letterman with his grumpy old guy routine). the quality and range of bits/skits has really improved over the decades.
they have a bit of filler, but once in a while do something impressive. bono ending fallon's first show with "ordinary love" was fantastic:
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i also like watching how the person interacts with the host. you can see some hate being there, others do elaborate bits (bill murrray is consistently great). some are divas, others are down to earth and some are insane (like crispin glover; go to 2m10s for the interesting part):
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late night isn't for everyone. but if you go in with low expectations you get surprised once in a while.