Switched to PES last year and never regreted. The football was a breath of fresh air for me. The passing was silk, player movements and ball dynamics looks way more realistic than Fifa's arcade-style football. I played Myclub exclusively and managed to build a super team with just a few dollars, something that is impossible on FUT. They give out plenty of the top players.
Of course there were issues like the jersey, club logo, face packs, interface etc. I would urge players who are considering the switch to not have high expectations of them. Fifa is leagues above PES in terms of design and interface, however its crown jewel lies in its football. It brought me back to the early years of Winning Eleven when I had trememdous fun with them.