Token Answer: Play what you think is fun.
Statistical Answer: If anything, it's fairly easy to max out INT for a caster class via gear so you may want to worry more about other stats. Frogloks have pretty decent strength and stamina compared to the anemic Erudites, High Elves and gnomes. If we assume the four most important stats are INT (naturally), STA (hitpoints), DEX (some skills & involved in fizzle chances) and STR (carrying weight), frogloks show themselves to be a pretty solid race:
Starting INT STR STA DEX Total
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Froglok 85 70 90 100 345
Erudite 117 60 80 70 327
Dark Elf 109 60 75 75 319
High Elf 102 55 75 70 302
Gnome 108 60 80 85 333
Human 85 75 85 75 320
Each race gets +30 bonus points so, while frogloks shore up their INT and other races try to raise their STA, frogloks still come out ahead in raw stats. Again, INT is easy to raise up (my lvl 40 mage has something like 285 INT if you disregard the 255 cap), the other stats sometimes less so.