We were there Feb 12-23. Feb 12 -17 weather was only in the 60's most days. February 17 -23 it warmed up into the low 70's.
Saturday we went back to MK. I know alot of you avoid MK but we just had some things left to do which we hadn't done yet. If you get there right at park opening and use fast pass you can do quite a bit of the park. Here's what we did between 9am-3pm. Buzz lightyear, DH did Alien Encounter while boys and I did teacups, carousel, we were at Toontown for the rope drop so we could do Goofy's Barnstormer, Space Mountain (using Fast Pass), Splash Mountain once with fast pass one time without, Hall of Presidents, Tiki Room under new management, Big Thunder Mtn (fast pass), and watched the parade from a table by the ice cream parlour. Keep in mind we had done most of MK on Wednesday February 13. Of course on Saturday we repeated a few that we had already done too.
Sunday Feb 17 we went to MGM. Not too crowded and was able to get quite a bit done.
On President's Day we hung around by the pool until about 1:30pm. Then we went to Animal Kingdom just to do the things we missed the week before. Got there about 2:00pm. We did Rafiki's Planet Watch, Flights of Wonder, Tarzan and my son got his face painted. Animal Kingdom was quite crowed but manageable if you didn't need to see the whole park on this day. We then took a bus to Epcot around 5:30pm. Epcot never really seems crowded to me. We had dinner at Rose & Crown so we really didn't walk around the park too much.
If I had to choose a park for President's Day I'd go with Epcot.