I promised some before/after pictures -- and here they are:
Before: The doorway between the vanity and bath/toilet area really made the room feel small (and it was stupid -- because there wasn't even a door there!) You can also see where my son put a hole through the tile in the shower -- turned out that the builders used regular drywall and a bad grout job -- and the drywall had turned to mush.

After: We knocked out the wall with the useless door and built a pony wall instead. It opens the room so much! We also used the same tile we used in the master bathroom (discontinued -- so it was a steal), as well as accent tile left over from our kitchen remodel -- and there is the mosaic I made. I think it looks great!

We were running short of tile by the time we got to the floor, so we created this pattern to make use of the different types/styles of tile we had left. We like it a lot! You can also see the "new" cabinets. We found a mirror we liked in an espresso colored finish -- and got paint to match. We updated the old cabinets with the new paint and hardware.

Here's a better look at the cabinets and pony wall.

My son is loving his updated bathroom! I've already started on my next project -- updating my daughter's bedroom (who spends most of the year at college) to be more adult, sophisticated, and a great looking guest room when she is away. Pictures soon to come!