There's a reason it's 6 years, as you say 2 years basic course to be an Army pilot, then 4 years first tour germany/UK based, during that time you will work towards 'Aircraft Commander' qualification and combat ready plus perhaps Apache conversion. Towards the end of the 4 year tour you may be invited to apply for transfer to the AAC. If you transfer thats you until the 22 years expires or if you don't transfer you return to your parent Corps/Regiment.
Life as an army pilot? As others have said, you'll still be the soldier first, if you're a JNCO you'll be doing Guard duties, fatigue parties and the rest of the soldiering stuff that goes with the rank (you'll also get the lions share of the short notice early and late slots in the simulator, night flying roster etc). If you're a SNCO, its guard Comd, orderly SNCO etc, mess duties, commitees, organising night flying, and you still get to stand in the rear rank at muster parades.
Of course your life will mainly be taken up with flying, training for flying, and planning for flying. It's a life of intense scrutiny of your standards both on the ground and in the air so not for those who can't take orders, adhere to SOPs and take criticism.
Currently you'll be deployed for 4 months around every 18 months to 2 years and when back you'll be training to go again or tasking on exercises around the UK etc.
If you can do all of that you'll be rewarded with some great flying and some great mates that you can rely on. One word of caution for anyone thinking it's a quick way to get a good qualification to a good job outside, It will take around 10 years of flying to gain sufficient flying hours for a professional job outside, and the market is slimming by the day, we're just about to see around 30 to 40 police pilots (ex mil-2000 hours plus) be made redundant due to cuts in the next 18 months.
Good luck, that was the path I trod, and wouldn't have changed it.