Once in a while, I may make a request but I do hate to put restaurant staff out because as has been noted in thread, they do get visibly annoyed sometimes when you object to the first place they want to seat you.
In my case, as I have been a solo diner over the last 10 years at Disney, I have had staff try to shuffle me off to the bar at times, at which time I always tell them, "No thank you, I prefer a table". One time, even after telling the hostess this at Jiko, the waiter she gave me then proceeded to take me to 'The Cooking Place' area, which isn't a bar, technically, but that offer had been broached to me, as well, by the hostess, and I had already politely refused it, so I don't why the waiter proceeded to still take me there, well of course, I spoke up and reminded them that I had already mentioned to the hostess I wanted a regular table - I felt bad, but they were nice about it and took me to a regular table.
I have turned down those crazy high stools before at Raglan and other places that have them, too, they are simply not comfortable. I just want a normal table, it's all I really ask for LOL.
Though I also don't like it when a place is nearly empty with lots of room and they sit you right on top of the other couple of people in there, ironically this happened too, at Jiko, once, and I didn't say anything but regretted it afterward because it was the kind of seating where you all share the same "back" - it's a cushion wall and the tables are all next to each other, so I was so close to the couple, who were on a date next to me, I had to hear their entire conversation, when again, the restaurant was like maybe 30% full. The next time, I would speak up, as I really don't like to be THAT close to a party. I would rather wait, even, for a better seat. As I've gotten older, I've learned to not be afraid to ask for what I want at restaurants now, again, I would never make an unreasonable request but I'm not going to be super uncomfortable either, not for these prices, for sure, and I always give a generous tip (not that one had to expect comfort, of course), but I just always do show my appreciation, I mean, for a good table and good service.
But like 95% of the time, I am pretty happy wherever they seat me.