Based on only having played MGS and Playtech I'd go with....
1. Playboy - Sofia's running wilds
2. IR - Wild Desire
3. Great Blue - 23 spins at 10x
4. Terminator 2 - but only IF you get Hot Mode (and I still feckin' haven't!)
5. Jackpot Wheel on Dark Knight - It may be brief, and it's almost always an anti-climactic win of a tenner. But there's always that
"dare to dream the virtually impossible dream" element of it. That you MIGHT be the one who becomes an instant millionaire.
I could just as easily taken one out of the above list and replaced it with any one out of: out Tomb Raider SOS, GWG2's Frozen and Magnetic Wilds, Untamed Giant Panda and Wolf Pack, Jurassic Park's T-Rex and Dilophasaurus features, Trailing Wilds features in Avalon 2 and Santa's Wild Ride.
If I had played games by other developers, I would certainly have considered putting Magic Portals, Creature From The Black Lagoon
and Bruce Lee (20 spins with wild reel) on the list. Because they all look extremely good.
I haven't ever seen a video of a bonus round of Raging Rhino or Montezuma played out, but if two of the first three people to post here
nominate both of them, then maybe I need to start watching the vids in the Winner Videos thread here to see what they are made of