Yay good topic!
First register your stuff to get access to Propellerhead support and forums. Downloadable goodies awaits.
Reason is quite fun for just dicking around and patching and side processing synths. The purchasable addons like Reason Drums come with different pre-installs of nice setups that you can use as a base to get cool sounds.
Second, Reason has been by far the most user friendly professional audio software. Having gone through through Sonar, Cubase and Ableton Live, the Reason is currently living mostly Rewired to Reaper. Reaper is definitely the undisputed DAW king in price/performance and I highly recommend you to check it out.
If you plan to record and combine live instruments with Reason's synths, Rewiring is the way to go, I'd say.
At the moment I have Korg Axiom25 and Trigger Finger hooked to Reaper that sends midi signals via Rewire to different instruments in Reason and sends live audio back to Reaper that are recorded on different tracks. Cheapass Firewire M-Audio Solo audio interface is enough to record 16+ live audio tracks in 24bit/48khz.