I use whatever. I have bought about a million decks of cards, and people always give me decks of cards as gifts. But as for the post...
Custom look cards are okay to perform with. I've only had a couple of people say the deck is marked or a trick deck. I just let them look at them if they want... I also have a very visual deck switch that I do and switch to Bikes... then ask if they'd rather me use those. Which I guess could also scream "magic cards" since they came out of nowhere. But if they want to believe the trick was done with trick cards, I let them.. keeps them from really thinking about the effect and begging to know how I did it... and in the back of their mind, they don't KNOW and the know it.
Custom look cards are okay to perform with. I've only had a couple of people say the deck is marked or a trick deck. I just let them look at them if they want... I also have a very visual deck switch that I do and switch to Bikes... then ask if they'd rather me use those. Which I guess could also scream "magic cards" since they came out of nowhere. But if they want to believe the trick was done with trick cards, I let them.. keeps them from really thinking about the effect and begging to know how I did it... and in the back of their mind, they don't KNOW and the know it.