I didn't dislike him either; it was simply a matter of timing, and who he was coming in to replace. Conte is a club legend both as a player, and as a coach (during his tenure here), so it was quite difficult to stomach his departure. However, Allegri has proven all the skeptics - including myself - wrong. Nonetheless, I prefer continuity, and changing coaches every so often can destabilize the squad. I don't rate Spaletti, and he doesn't strike me as a coach with personality and character. Again, I could be wrong, but we have also made mistakes when hiring coaches in the recent past (Del Neri and Zacheronni come to mind), so it's not beyond the realms of possibility that our next coach could be a bust, and therefore I have every right to be skeptical.
I'd rather stick with Allegri, and if he were to leave (absolutely had to leave), I'd rather go with someone more proven and established, especially in Europe, like a Simeone or Ancelotti.
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Deschamps reached a CL Final with Monaco, led us back to Serie A, won a ligue 1 title with Marseille, and came within a whisker of winning The Euros last summer, and he's only been coaching since the turn of the century. Spaletti won a couple of titles in Russia, a Coppa Italia, a Supercoppa, and almost, almost won a weakened Serie A in his glorious and storied career that has spanned over two decades! Go figure!