rossco
Congrats on your PPL! Type conversion might be an issue (presumably C150/152 in US, PA38 at Glasgow). Glasgow is Class D with entry/exit lanes/procedures, but the ATCO's at 'PF are excellent about non-standard VFR clearances. so your checkout might take a little longer. Glasgow Flying Club won't let you apply to be self-authorising unless you've got 100 hours or an IMC, so all your flights will be authorised by an instructor (that should keep you out of trouble!) which can be a little bit limiting if one isn't around!
Weather during winter is only really an issue if the aeroplanes are covered in frost/ice. (Takes ages to defrost and the BAA will close area Whisky including the taxiway if they think it's a bit slippery). Also the short days restrict you, but I've had some excellent flights November-March. Having said that in a winter month the PA38's do about 1/3 to 1/2 of their summer monthly utilisation.
Oban is 30 mins (ok, usually 35 mins) away; Islay 45 mins; Prestwick 15 mins; Cumbernauld 15 mins if you're naughty and take a city-centre departure; Campbeltown 35 mins. So you can amass a load of reasonable land-aways relatively cheaply, especially if you buddy with one of the low-time PPL's.
Remember that you've got Prestwick and Cumbernauld to choose from as well. If you're interested in an aerobatics course, go to Prestwick Flying Club and have some great fun in their Bolkow Junior with an excellent instructor.
Hope this helps....