While I have no need of the deep reclining or swivel features so many here add to their builds I also find the stock seats comfortable enough even on long drives. ("long" for me being 240 miles round trip same day
If they're in good shape with the inner foam still solid and supportive, if the spring suspension under the upholstery is intact they seem to fit my butt and needs too.
I like the stock fabric at least up through the middle '00's---its long lasting and seems very durable. Leather or similar covers tend to "sweat" which makes me uncomfortable. That's a nice look though----something very luxurious about how they look and feel (for a short while anyway.)
Just my $0.02 worth---take with a grain of salt.