I've been like that for a while until I realized I could just keep some fiat on intersango and just re-buy the coins right away, the trick is to not run out of fiat on the exchange.
Makes it a lot easier to spend bitcoins. Actually I find bitcoin exceptionally easy to spend and I've spent it on stuff I hadn't spent fiat (online) on before: virtual servers, socks, gardening supplies, physical bitcoin, a bitcoin magazine (not yet received), stock, shares in a movie production, lottery tickets, sports and other bets, conference tickets. I also spent it on stuff I have spent fiat on before: sd cards, GPUs.
I've also spent bitcoin on something I hadn't really spent money on before, at least not on that scale: donating/tipping.
In summa, due to bitcoin, I probably spent more money than I would've spent without it and I definitely shifted some of my business to a different supplier because that supplier accepts bitcoin.