One thing that makes the add-on packs 'hot' is that they inter-act with the Bliss game itself. The add-on packs also address various fantasies as well as some taboo's. The actions range from talking about anything from different types of stimulation, as well as various positions for intercourse, as well as ways to expand on those as well.
Again, the add-on packs are going to respond to various questions you answer in your profile - and the add-on packs also expand on the profile options. The item/equipment list is also expanded significantly, and I foresee future additions to future packs as well. Most notably, Liberator Shapes has agreed that we can list their shapes and include them in our future add-on packs.
Of course, you can always modify your profiles as you play the game. If your partner has an interest (for example) in the use of sex toys but you have concerns about including them, there is an option to discuss that. If you are already comfortable with those, then there are actions that include them.
One other bit of information that may also contribute to the add-on packs being 'hot', is that Dr. D. is a female, so often includes aspects and insights from her own point of view as well as information she has learned from counseling other women and other couples. Though, do keep in mind that even Dr. D. has her "Level 10's"! But at least she is open minded. What may be a 'turn-on' for you, may be a 'turn-off' for her. But she at least tries to put the options out there for couples who may want to try a bit more adventure.
I do hope this helps. For a personal reply you may also contact me at
BlissNDLight@yahoo.com