There have been several threads with the same question in the past, if you search for them you might find them, but of course since this is a dynamic forum, it never hurts to ask that question again every once in awhile: as KK said things change, - people's preferences do for one, and of course the fact that there are several slots from the bigger providers like MG, Netent, WMS, Playtech/Ash Gaming and IGT
*, followed closely by Leander and a handful of other providers coming out every month or so, and the newer providers like Play&Go, Thunderkick and for instance BGO are also trying hard to make a name for themselves, there are bound to be changes is anyone top 10
Personally i am very impressed by Play&Go, they do have a knack for some copy catting, but as i expressed in previous threads, i really think they are taking much of the best from all providers and adding a little spice of their own and popping out one insta-favorite after the other (i.m.o.)
Also very keen on Thunderkick, very promising so far, really enjoying their releases too.
BGO games ditto, but so far i have seen only two (wink-wink-nudge-nudge @ Paul), so they cannot really compete yet, but i must say that both games are very enjoyable to me personally.
If i have to pick 10 now it would be:
1: Terminator 2 (MG)
2: DoA (Netent)
3: Energoonz (Play&Go)
4: The Fairest of Them All (Ash Gaming)
5: Wizard of Oz - Ruby Slippers (WMS)
6: Fire Queen (WMS)
7: Avalon I & II (MG) - bit of a cheat here but i like them equally
8: Classic 9-Liners, most played Agent Jane Blond and BDBA (MG)
9: Enchanted Meadow (Play&Go)
10: Jazz of New Orleans (Play&go)
And now i am already regretting that i did not include the Jurassic Island from BGO, which would probably be nr. 11, and a few Netent slots like Starburst, Gonzo's Quest, CFTBL, which would be the next few in the list, as i am afraid the slot gods will punish me with unlucky streaks on those slots for not putting them
up there
Also should have thrown in a few games like Goldilocks, Treasure Island, Tesla, oh my, the list goes on and on
I have to agree with both Tirilej and KK, it's REALLY hard to pick one or even just 10!
*don't follow that software as it is the only one i can not play due to country restrictions