You just have to keep at it - there's probably tons of great stuff left to find in DBPro. Hell, I've been using DBPro from practically day 1 and I still have tons of things to experiment with and learn. DBPro is changing all the time, nobody ever learns it completely, which is fine as long as you keep up to date with what's changed or changing.
If your really bored and want something to get your teeth into, and are stuck for a xmas present idea - then why not get a pair of those VR specs, and make a VR world game, or adapt an existing game for VR. These oppurtunities are opening up - I mean those specs cost about £200, for a VR headset that works with DBPro!. If you stop learning, you've stopped trying.