I have never flown mode 1 before, but your mind can get used to to anything you train it to. All full scale airplanes are based more on the mode 2 concept, pitch and roll in one place. If aerobatic performers and state of the art military jets use the technology, it must be fine for use in tight situations.

Mode 1 will make you the oddball out - but that is alright. You might want to work on both with an unbiased opinion and see which you like more. Perhaps try to land your sim under both to see if there is a natural tendency in one direction.

I believe that as you get your full scale ticket, you'll find yourself thinking in terms of pitch and bank on one stick so naturally, it'll carry over to RC in a more "mode 2" fashion. For example, when you roll into a steep turn, you need to increase the pitch a bit to compensate for the drop in vertical lift. Later, whether RC or full, every time you bank over a good bit, you'll find you are adding back pressure to the stick. Sure, mode 1 does the same thing, but you will be thinking in terms of operating two separate controls to do it.

Just random thoughts - do what you like. Its a hobby, after all.