Quite frankly, it doesn't matter what team you choose. If your posts are of quality, and you try and put a little emotion into them then people will read it regardless which team you've chosen. Nick's(The FM Rookie)KuPS stories and Or's(or.dabool) Boreham Wood story were two of the most popular stories on this site and yet no one had heard of these teams before. Both of their Liverpool and Milan stories were equally good, but the data loss put an end to them. So basically, the picking of the team is not that important (so as long as you are able to play with any team and do not get bored)
To give your story(and your save) a reason for you to keep it going a little longer, I suggest you start off with one of the "fallen giants" - teams with a great history of winning cups and challenging for the league that suddenly dropped - or just a regular mid-table team that you can leave your mark on.
My choices would be -
Villarreal(they dropped to the Segunda),
Bilbao(they aren't mid table or a fallen giant but their rule of signing Basques only will keep the save interesting),
Leeds(They were among the best in the Prem but debts caused them to spiral into League 1, they are now in the Champ though),
Cologne(I don't know why, just like them alot, I think they used to be challenging for the title in the early years of the Bundesliga, not quite sure though)
If you are keen on playing only as a team in the Prem I suggest Swansea(great squad, big budget, midtable-top half) or Southampton(Great youth academy and you have Gaston
But also a leaky defense)
Remember one thing, to have a successful story, you need continuity. Doing a story that lasts a week won't become a hit. If you don't get the reaction and the comments that you were hoping to get, try to fix your grammar(bad language can be very offputting) or introduce something new to your story that we've never seen before. But most importantly,
keep it going. Even the best writers on this site had points in their stories where no one commented. But eventually everyone read their stories and realized that it was quality, and they started following them.
Sorry for boring you with the long post(hopefully you'll find it helpful) Good luck, hope you do a great story.
