Nikon 3100. What's your opinion?

Is this a good camera? If not, what do you suggest?

Added (1). *Nikon D3100

It is a fairly average camera but the Canons are a lot better, namely the EOS Rebel that is more recent and has more features plus a larger sensor. If you are looking for other cameras though, try Sony, as the Alpha series by them is fairly impressive. I just bought a Sony-A390 DSLR and was very impressed by the picture quality. This is because the sensor is CCD not CMOS like the others, which only cuts down on graining at the cost of quality. The CCD has more noise but a higher image quality, so choose which one you need to have more in your images, less noise or more quality?

In the Nikon range the D5100 is an excellent low cost performer.

Here is a lab test comparison to the D3100:

http://aviewfinderdarkly.com.au/2011/06/05/nikon-d5100-digital-slr/

In the right hands it will take excellent photos…

A camera is but a paint brush, it is more important who is holding the brush than which brush it is. All decent cameras can take wonderful pictures in the right hands. Spend your time studying great lighting and composition because even a great camera can't fix bad lighting or composition. And have fun with whichever brush you buy.

It's an impressive entry level camera at an attractive price point. If it feels good to you then go for it