Expansion Questions.

[exsoldiercl0ud]

1. I bought 'Munchkin' and played it with my friends. Loved it, and decided to get expansions 2 and 3 (waiting for them to arrive). Do I just add them all together making two giant decks?

2. By adding these expansions, can I increase the amount of players allowed to play? If so, what's a good number that I should follow?

3. By adding the expansions, it seems like the decks will never reach the end. Isn't that bad?

Thanks!