Gaming is for having fun. Fun requires clear rules.
I can say that there is no problem with playing 6 times in a row (switching sides, revenge, etc.) I don't know how it works with playing every day, but I play it about 1-2 times per week from 3 months.
I've played this 12 times since October when I bought it and it is surprisingly replayable - much more so than I thought when I bought it.
There are some things you learn after a few games (I'm trying not to give them away) that subtly change how you and your opponent play and this will impact how you play - and how your opponent then has to play against you.
If you've not already played the game at least five times, DON'T READ the bit below!
Spoiler (click to reveal)
If you insist:
That there are only so many attack cards for the dwarves and so, as the dragon it is generally sensible to allow the 1 wound attacks to succeed, so that you can keep the blocks back for preventing the more damaging attacks.
As the dwarves, once your opponent learns this, your attacks are at an absolute premium and so you have to manoeuvre more carefully to ensure that you never waste an attack/more card on moving.