Typhoon of course
Gigantic, with a swimming pool (if I'm right), I must say that working with it is somewhat a luxury rather than a tedious task. Furthermore, the endurence, the power of it, and its lovely 20 missile silos housing 20 R-39 SLBMs, it would be difinitely fun to drive it
I don't wanna drive that Borei class or the earlier SSBNs like Delta class. For delta class, it is clear that it is aged and prone to errors. its weapon system is also old and relatively less powerful. The Borei class is so new that I don't think any of its system has matured. There may be fatal problems in its design