Uhmm... MusicallyInspired, your picks for #2, 5, 6, 9 and 10 are LucasArts/LucasGames games, not Sierra games...

I'm not sure about #11 and 12, though.
My top ten Sierra games, in no particular order, are...
10. Quest for Glory 4 - what an utterly
beautiful game... this game, for me, beats anything else, hands down. I'll even forgive it the infamous error 52.
9. Quest for Glory 2 - I just can't go past this utter classic. Anyone who's played it, I'm sure, will agree.
8. Leisure Suit Larry 1, Quest for Glory 1, Space Quest 1, Police Quest 1 - these four games occupy a slot of their own, simply for the nostalgia value. QfG1 was the first game I played. *smile*
7. Gabriel Knight 1 - I don't think I need to explain why this one is here.
6. Gabriel Knight 2 and 3 - I never managed to beat GK2, which is why it occupies a shared slot. GK3, for me, was a bit of a letdown after GK1; GK3 is a gem, but it felt rather bittersweet for me (particularly because of the ending).
5. Space Quest 3 - this one's here because it was the first of the Space Quests that I really enjoyed - as in, it was the first one that I
didn't have a fear of Roger dying any second.

SQ1 and SQ2 were fun, but it was far too easy to die, especially with the AGI interface.
4. Jones in the Fast Lane - oh, I remember this forgotten little gem. It never got the market share of the big 'Quest' games, but it's just as good!
3. Hoyle Book of Games 1 - I used to love this one when I was much younger. I still dip into from time to time, simply because it's fun to play silly card games with silly characters.
2. Police Quest 2 - as good as the original was, I doubt anyone would argue that the second was better, more complicated, and with greater depth.
1. A toss-up between LSL2 and LSL3, for the same reasons Tawmis mentioned.
I don't mention the King's Quest games because I never played them that much. The only one I managed to beat was KQ5 - and I thought that KQ was basically a less complicated version of QfG. That, and Cedric really got on my nerves.
