I intend to mostly dive in the Adriatic, perhaps a trip to tropical country or a liveaboard at some point, but I figured I'd get a separate 3mm suit for that.
Now, since the thermocline is somewhere around 10m-15m of depth, almost every dive I've been to has put me in pretty cold water (16C). The surface temperature is over 16C from around April to November. If bare is as warm as they tell, I might get an extra month on either end where I'll be able to dive. I might go for drysuit at some point down the line, but I can live with not being able to dive 3-5 months of a year for now.
Also, I'm buying my first set of gear. Currently, I'm looking at almost 4k€ to get everything (excluding a tank). Dry suit would be another 2k€ onto that, and I'm not even certified for it.