I'm going to throw in another vote for the Nikon F90X. My brother gave me a gently used one as part of my Christmas present several years ago, and it's chugged along well ever since. The sticky back problem can be remedied with a piece of stiff plastic card and some 90% isopropyl. The camera is auto-focus capable and allows a very wide latitude of manual control. You have to get used to the buttons and dial menu system, but it's not too steep of a learning curve.
In the past, my now ex-MIL gave me her N8008 when she upgraded to something else. This was probably 20 years ago. It came with a basic Nikon AF kit lens. It had a similar setup to the F90X I have now. Sadly, the many trips it had taken to the beach over the years had allowed salt air and possible spray to start their work corroding its innards, so I didn't get to use it more than three or four years before it started having issues. Kept the kit lens though.
My brother uses mostly Canon gear, both film and digital, for his photography, and probably has since his early student days in the mid-90's. He said that Canon's AF can beat Nikon's even though Nikon has worked on their technology over the years. I've never used Canon, nor any other AF SLR, so I can't speak to anything else.
-Bill