DS (8 games) :
Rune Factory: A Fantasy Harvest Moon (Jan, import), The World Ends With You (May), Etrian Odyssey (Jun), Izuna (Jun), Apollo Justice: Ace Attorney (Aug), Children of Mana (Aug, 10 euros), Sonic Chronicles: The Dark Brotherhood (Sep), Harvest Moon: Island of Hapiness (Dec)
All finished, except Harvest Moon: IoH, that I'm currently playing.
Rune Factory, The World Ends With You (to my greatest surprise), Etrian Odyssey, Izuna, Apollo Justice and Harvest Moon: IoH (so far) excellent.
Children of Mana was very boring (but thankfully, I only payed it 10 euros), and Sonic Chronicles quite disappointing (should have saved the money for Castlevania: Order of Ecclesia or Professor Layton).
PC (1 game) :
Spore (Oct)
Spore didn't lived up to my expectation. A lot of potential, but the developpers have probably been too much ambitious. Maybe the extensions will improve that...
So 9 games bought in total (~360 euros). Finished 8. Not bad considering how much work I have had this year, and that video-game isn't my main leisure (I spend ~150-200 euros per month on mangas, anime, J-Music and derivated just to give an idea).
