Hi Phoneix,
Sure, I think this happens with me sometimes...
For tarot... I just gravitate to what feels good to me at that moment. I have tons of cards and sometimes I just grab whatever is in my vision Lol. If it doesnt feel good I wont touch it..
Oracle decks are a little different for me because they are mostly positive oriented messages. I definitely use the same oracle for months. I tend to build a stronger connection with oracles than tarot because tarot is more entertainment/game play for me. Right now my oracle I hold dear to me almost every day is The Wild Kuan Yin. Her embrace/messages have been a very powerful guide in my recent journey
I am sure when I move on to another phase in my life, be next month or next year another will come along...