I'm sorry I don't have a picture, but I believe the instances I've seen, right above the baseboard, the rounded edge comes out in a semi circle to form a 90" angle so your baseboards are "normal". I'm sure someone will have a picture to share. j.

You want your drywall to have bullnose corners. Not a big deal, just takes a different type of corner bead.

Our last house (a 2000 sq ft Pulte in Texas, built in 1998) had rounded corners on the drywall. The baseboards came to a 90, just like normal, and I believe the trim carpenter just put more caulk in the joint. It didn't look very good. Plus, I found that the chipping was worse b/c the texture didn't stick very well to the plastic rounded corner, so when it chipped, it REALLY came off in chunks. Perhaps the technology has improved, but I won't be going this route again.

you simply buy a bullnose corner trim piece. they cost $4 bucks each and come in oak or pine.

Mine haven't held up too well. I love the look, but I think they get damage much more easily than square.

My baseboard corners have about a two inch piece of trim that meets the adjacent pieces at 22.5 degrees each.

I've seen both ways described above for baseboard trim, I haven't seen the bullnose trim used yet.

I prefer the double miter, two 22.5 degree cuts with a small piece in between. I think the straight 45 degree miter with extra caulk looks bad.

The same work has to be done for crown too.

We have rounded corners and love them. No denting, chipping, etc. and we've been in over 2 years. Empty nesters though. Smaller kids might make a difference.

If your trim carpenter is good, he won't do 45 degree cuts and he sure won't caulk. Ours cut pieces for the rounded edges - sorry, don't know the degree at which they were cut.

if you have denting problems its because you are using old technology metal corner beads. we never use metal anymore because it dents and cracks.
i recommend you use these. they glue directly to the drywall so you wont get movement cracks. they dont dent either.
http://www.no-coat.com/.docs/pg/10135

Our neighbor has the bullnose corner bead and we like it. I've subsequently put some in the basement remodel I'm doing on the existing home (actually, my wife is the designated drywall taper/finisher) and it seems to be going smoothly. No real difference than putting in L-shaped corner bead.

One thing to consider when using bullnose corners is how you transition colors from room to room. I personally think a color change on those corners look odd. You may want to ensure you have framed openings from room to room where you will change color.

Good point!

There are all kinds of bullnose accessories too. But you have to be sure your drywall company is familiar with them. I have to admit I have never seen bullnose corners. Of course, that makes me want to use them!

Here is a link that might be useful: Bullnose accessories

You guys are great. Guess we'll try to go with the PVC to avoid denting.

Vhehn, thank you so much for the link. The rounded corners were used in our new addition about 3 years ago. I'll be sure to use the new kind when we finish off the rest of the house.

Personally i like the baseboard with a center at 45 degrees cut at 22-1/2", but if you cant live w/o 90 degree baseboard mitered, you might consider this:

You'll have to find a supplier or maybe a hardware store where you can purchase only wheat you need, but this gives you an idea what they look like.

Here is a link that might be useful: dietrich transition

We did two different things around our base, a piece of cherry in our more formal spaces

and a drywall corner in our family areas.

The drywall guy and I were a bit distressed when we realized that the base in the family room wasn't as high as in the formal areas. He had assumed it was as tall and put corners on to match that. If he had known the base was shorter, he would have used a shorter corner.

As for paint transitions, we have a dark red and a lighter green from the stairwell to the downstairs family room. I think it looks fine, but my painter was the best!

On a side note, we used plastic corners and some of them had a small edge on them, that the dry wall guy couldn't plaster over. The painter took a thin knife and just ran it along the edge, taking a bit of plastic off with it. This worked.

here is similar to what i use.
http://www.cornerblockstore.com/price%20list.htm

On our rounded corners the trim carpenter cut and fit a piece to fit in. It looks really good and they did a great job! It looks perfect. I will try to get a picture for you!

Just a thought....put both plastic and metal? Plastics underneath to provide strength and metal over for the better paint adhesion? We have metal and they look great, but after one year back into the house, we are accumulating dents. I guess after a couple more years, I’ll have to repair them all and repaint. Love the look though. As for the baseboards, my tile guy wanted to 45 it but I made him 22.5 it and it looks great.