The eight games in written form:
Diddy Kong Racing
Perfect Dark
Super Smash Bros.
WaveRace 64
Pokemon Puzzle League
Ogre Battle 64
Buck Bumble
Pilotwings 64
Of that list, it is the latter half that would interest me if available on the N64 service. Games I've never played and are sort of deeper cuts.
However, if they want my money for the N64 expansion pack then all they have to do is put Mario Party 1, 2 and 3 on there (and add some online like all other multiplayer games) and I'm sold! Those are the top 3 N64 games I'd like to see. But I don't think that will happen for some time so as not to cut into Mario Party Superstars' sales.
If we are making wishlists for the N64 then here is my list of 8 games I'd like to see on the service which would likely get me to sign-up for it:
1. Mario Party 3
2. Mario Party 2
3. Mario Party 1
4. Harvest Moon 64
5. Mischief Makers
6. Space Station Silicon Valley
7. Beetle Adventure Racing
8. Tetrisphere
Of that list, I do own the first Mario Party but I've got it on there because I'd expect it to get online functionality added. If I'm making a list on games I don't own and would like to play that I might add Goemon Mystical Ninja to the list in place of it.