If you're blissful, you're happy and at peace. You can never have too many blissful moments.
If you're feeling blissful, then you're lucky. This is a word for total contentment and major happiness, along with a kind of Zen-like peace. Good spa treatments should be totally blissful. Getting an A in math or hitting a home run could make you feel blissful. A perfectly gooey piece of chocolate cake could be pretty blissful. A blissful moment is full of joy and relaxation. Sounds nice, doesn't it?