Sunrise the light is clearer and sharper, less warm and if you're lucky, you'll get some nice mists too at this time of year. Get up early and head to the hills if some mist is forecast!
Sunset is good at the moment, I'm gutted I missed tonights as I was busy doing other stuff alas (shopping, grrrrr) I'm planning on an early one tomoz and out late tomorrow night.
You will probably need to make 2 exposures or more and merge them, either traditionaly with layers in PS or with a dedicated HDR program, unless you have some ND graduated filters as the sky is almost guaranteed to be brighter than the foreground. Tripod is going to be another essential as will a cable release if the exposure time is over 30seconds.
If I was you, I'd just get out there and have a play. where are you based? Have a look around the web for local beauty spots and places of interest, use google earth to recce the places so you're going to be facing the right way (sunrise is no good if the vista you have in front of you faces west!)
Failing that, nicely illuminated buildings and cityscapes can look amazing with the right light
