I did the majority of the touristy things The Colosseum, The Vatican, Trevi Fountain, The Pantheon, and much more. The beauty of the city was amazing - seeing all the ruins of old Roman Empire buildings that have been incorporated into modern buildings was a sight to be seen. I also stumbled across some ancient Roman cats, within some of the ruins (Look closely there's a cat on the steps). There must have been 20 or so cats wandering around or sunbathing within the ruins. I was a little surprised that all of the cats didn't scare away the birds.
I queued for about an hour at The Vatican to get into the museum to see the Sistine Chapel. The museum is only allows entry from 8:45 until 12:30 so you have to get there early. The crowds in the museum were probably the largest I've ever seen. Part of the issue was that there are tours that are offered of the museum which allows people to jump the queue, of course then you're stuck with a pack of people wandering around hearing all sorts of things. I probably would have learned a thing or two about random pieces of art within the museum but I really was only interested in the Sistine Chapel. Don't get me wrong, I spent some time admiring paintings and statues on the 45 minute walk through the rooms en route to the Chapel. Once you get into the Sistine Chapel pictures are not allowed, they also try to enforce complete silence. It was definitely a breathtaking site, of course by the time I left a had a kink in my neck for spending so much time staring at the ceiling.
A couple of random things that struck me while in Rome was the following:
It is next to impossible to find an ATM/Cash Machine near the Spanish Steps or other tourist areas.
The Metro stops running at a very early hour - tried to catch a train at 9:30 and it was closed. I've never been in a city where public transportation ends that early.
There are vendors that will try to sell you all sorts of crap - I was having a cocktail in Navonna plaza with a friend and people kept walking through the patio trying to sell dancing chickens, fluorescent spinny toys, and CDs of their operatic works. It was a bit frustrating to be bothered every 5 or 10 minutes by somebody trying to sell something of little or no use. The most inventive salesperson I saw was a guy at Trevi Fountain selling mini tripods. I of course just used the ledge of the railing to take this picture.