This is quite interesting: I had a very similar bittersweet experience today!
So, I'm very (or was very) fond of mild cigars, but most recently I have been very apt to smoking Tat Angeles. I considered it a stronger cigar that I can enjoy and not get too overwhelmed by strength (and boy, do I do enjoy those)...
Today, I had a mild cigar (which shall not be named) and usually mild cigars are flavorful to me; they give me all I really like in a cigar that is not strong, BUT boy, when I went to that mild cigar today IT FELT LIKE I WAS SMOKING AIR! This totally ruined my mild cigar experience. I've always heard of more seasoned brothers loving strong/full-bodied cigars because mild cigars never did it for them...I feel like I now finally understand why.
Basically, I am happy to say that my smoking of Tats have made me able to smoke stronger cigars and enjoy them, but also, sadly, I feel like now mild cigars just don't do it for me any more. Bittersweet...indeed.