Pillow for me .I just posted a thread about this last week with pictures of my bike and seat . Cant believe I went as long as I did with the stock seat.Whoever designed that should have to sit on it forever with no relief.
I love the look of the seat on my 883 custom, however, after 300 miles this past sunday I was in pain. The last 50-70 miles I switching from front to reat pegs trying to take the pressure off my tailbone. Probably won't ever change out seats, b/c I don't think you can get too much comfort w/o changing the style of the stock seat.
Wow, this is the first forum I've been on where someone said he actually LIKES the stock Sportster seat! I hated mine. Traded it for a Corbin Solo w/backrest. The bike looks better without the backrest, but it's soooo comfy with it. I went from 45 minutes max on the stock seat to 2-3 hours riding time with the Corbin. Not cheap by any means, but two years later, it still looks great, and it gets a lot of exposure to the FL sun, too.
My '04 1200 Custom with the stock seat is the best long haul ( 750 mile day ) seat I've ever had. I owned Yamaha's, Honda's and Suzuki's and had to have the seats replaced. I wouldn't change the seat on my Sporty ever.
After 8,000 miles in 5 months on a Stock seat, my butt has no feeling left. Would like to get a Mustang seat, but am planning on trading up in the Spring. I'll continue to live with a numb butt.