I'm only new to astronomy, so this won't be very exiting to most of you, but it was good for me.
I was bought a 60mm Tasco refractor a couple of years back. Couldn't see much through it, just M42 as a smudge on the sky, Jupiter, Mars and the moon and a few GC's

.
For my birthday in September wife got me a 10" Dob

. To date, M42 is the most memorable thing I've observed and that was with a half moon and the nebula low on the horizon. Compared to the view in the Tasco there was no comparison. Seeing the faint detail in the nebula and having it fill the eyepiece was awsome

. Can't wait till I get to a dark site on a new moon. I'm sure I'll have many more memorable nights of observing to come (especially when I get my UHC filter for Christmas).
Cheers