@SJT63Yes, I agree, Morse has aged very well. Even the extremely dated forensics and referances to computers aren't very disruptive because the stories flow so well, even with contemporary viewing.
Still, I like Lewis a bit better. I think Lewis is a bit easier to take because in the background, he is always gradually drifting closer to his ultimate happy ending with Hobson; whereas Morse's story is ultimately very lonely and tragic. I also like the power balance in Lewis, which Morse doesn't have.
Morse rules the roost in his series. He has all the book smarts and dective wisdom, and Lewis is almost always his poor browbeaten inferior in the vast majority of matters. But in Lewis there is a nice balance between Lewis himself and Hathaway. Lewis brings all the world wisdom and detective experiance to the table, whereas Hathaway's book smarts are constantly invaluable. Their a much more satisfying partnership IMHO, and they enjoy each other much more then the strained relationship between Morse and Lewis.