Why would a transaction take 90 minutes to get confirmed? I'm just starting out with alt-coins, and have executed a few transactions with both bitcoin and dogecoin and they all seem to "go through" in less than a minute. I've transferred small amounts between wallets (my own) done some gambling and everything seems to transact within 2 minutes tops.

I just made a small deposit to cryptsy and it took 90 minutes to get confirmed. I'm wondering why it took so long this time. (FWIW I do have 3 wallets up right now, Bitcoin-QT, Multibit, and Dogecoin-QT, if that matters.) My network connection seems to be working normally.

My wallet indicated it was confirming (1 of 6, 2 of 6, etc.) and I've never seen that before.

Any clues, anyone?
Bitcoin has longer confirmation times than many altcoins like Litecoin or Dogecoin, and different services make their own choices about how many confirmations to require before a deposit is made available for use.

While you can see a new transaction on the network almost instantly, many services require six confirmations to prevent double-spending.  With Bitcoin, six confirmations will commonly require an hour and perhaps more if no transaction fee was added.

Given the description, it leads me to believe that Cryptsy wanted to see six confirmations before making your deposit available to you on the Cryptsy site. It's not really unusual to see that take the 90 minute wait you experienced.