Latex is easiest to apply and cleanup. Butyl rubber is dead last.
Silicone is essential to seal around bathtubs, showers, lavatories, etc.
There's special bathroom caulk for this that has a mildewcide. This poison has been known to be hazardous if used inside dishwashers because the high heat outgasses the poison onto the dishes and is then eaten. A well known consumer product rating magazine last rated caulk in 1993. Every brand had caulks that scored throughout the range from good to bad. I use this caulk where silicone isn't appropriate.