The 91-92 team was more fun to watch than any other Rangers team I've seen. They could win 2-1 or 8-6, & you never knew which one you were going to get on any given night. That comeback against Washington in December '91 was so epic.
I also really enjoyed the 96-97 team and wished that team had somehow been able to be constructed slightly differently. Keep Kurri from 96 to reunite him with Gretzky in 97 (instead of Sundstrom on Gretzky's wing), bump Sundstrom down to a more defensive role, and don't sign Pat Flatley. One more year of Marty McSorley playing part time back when a player like him who could be mean and clear the net front met something vs. Eric Cairns who couldn't keep up with the play yet, and Doug Lidster who wasn't great on defense.
Would've loved to have seen Gretzky and Messier win a Cup together in NY, and unfortunately that was the only season they played together here before management let Messier walk to Vancouver. The following year all the rest of those guys got older or (Robitaille) were traded in bad deals, and somehow we were led to believe that Mike Keane, Brian Skrudland, a Second Impact Syndrome version of Pat LaFontaine, and Tim Sweeney could somehow replace Messier, Robitaille, Russ Courtnall, and Esa Tikkanen up front.
That team got destroyed by injuries in the playoffs, although I don't think they were getting past Detroit regardless, but I thought if healthy (especially if Kovalev hadn't blown out his knee), they would've given the Flyers a serious run for the money.
05-06 was also a great team with a lot of depth and one gaping Brian Leetch sized hole on the blueline (should've brought him back as an FA), and was so disappointed in that team for the first round loss given their talent. They couldn't keep all the secondary scoring pieces around the following year (guys like Sykora), and it really hurt them.
Also thought 2012-13 was a solid team and would have loved to have gone back to an alternate reality where the most overrated coach in this franchise's history actually decides to let Nash, Gaborik, and Richards play as a line the entire season, and actually dresses Kreider and Zuccarello consistently as secondary scoring.